Updated on 2025/06/18

写真a

 
Kasahara Shigeru
 
Organization
Scheduled update Professor
Position
Professor
External link

Degree

  • 博士(理学) ( 2003.3 )

  • 博士(理学) ( 東邦大学 )

  • 修士(理学) ( 東邦大学 )

Research Interests

  • 超伝導

  • 量子液晶

  • 強相関電子系

  • 高温超伝導

  • 強磁場物性

  • 低温物理学

  • 熱測定・磁気測定・輸送現象測定

  • 凝縮系物理学

Research Areas

  • Natural Science / Magnetism, superconductivity and strongly correlated systems

Professional Memberships

Committee Memberships

  • パルス強磁場コラボラトリー運営委員会   委員  

    2023.4   

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  • 東京大学物性研究所附属国際超強磁場科学研究施設運営委員会   委員  

    2023.4   

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  • 強磁場コラボラトリー運営委員会   委員  

    2023.4   

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  • 高温超伝導フォーラム   幹事  

    2021.10 - 2023.9   

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    Committee type:Academic society

  • 高温超伝導フォーラム   幹事  

    2021.10 - 2023.9   

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    Committee type:Academic society

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  • 日本物理学会   領域8運営委員  

    2016.10 - 2017.9   

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Papers

  • Field-Free Superconducting Diode Effect in Layered Superconductor FeSe

    Utane Nagata, Motomi Aoki, Akito Daido, Shigeru Kasahara, Yuichi Kasahara, Ryo Ohshima, Yuichiro Ando, Youichi Yanase, Yuji Matsuda, Masashi Shiraishi

    Physical Review Letters   2025.6

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevLett.134.236703

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  • Magnetothermal transport in ultraclean single crystals of Kitaev magnet α-RuCl3

    Y. Xing, R. Namba, K. Imamura, K. Ishihara, S. Suetsugu, T. Asaba, K. Hashimoto, T. Shibauchi, Y. Matsuda, Y. Kasahara

    npj Quantum Materials   10 ( 1 )   2025.3

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    Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    Abstract

    The layered honeycomb magnet α-RuCl3 has emerged as a promising candidate for realizing a Kitaev quantum spin liquid. Previous studies have reported oscillation-like anomalies in the longitudinal thermal conductivity and half-integer quantized thermal Hall conductivity above the antiferromagnetic critical field H c , generating significant interest. However, the origins of these phenomena remain contentious due to strong sample dependence. Here we re-examine the magnetothermal transport properties using recently available ultra-pure α-RuCl3 single crystals to further elucidate potential signatures of the spin liquid state. Our findings reveal that while anomalies in thermal conductivity above H c persist even in ultraclean crystals, their magnitude is significantly attenuated, contrary to the quantum oscillations hypothesis. This suggests that the anomalies are likely attributable to localized stacking faults inadvertently introduced during magnetothermal transport measurements. The thermal Hall conductivity exhibits a half-quantized plateau, albeit with a narrower width than previously reported. This width reduction can be understood through two distinct mechanisms: sample-dependent magnetic critical fields that influence the lower boundary of the plateau region, and the decoupling between chiral Majorana edge currents and phononic thermal transport that determines the upper boundary. These results indicate that structural imperfections exert a substantial influence on both the oscillation-like anomalies and quantization effects observed in magnetothermal transport measurements of α-RuCl3.

    DOI: 10.1038/s41535-025-00749-4

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    Other Link: https://www.nature.com/articles/s41535-025-00749-4

  • Apparent nonreciprocal transport in FeSe bulk crystals

    Taichi Terashima, Shinya Uji, Yuji Matsuda, Takasada Shibauchi, Shigeru Kasahara

    Physical Review B   2025.2

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevB.111.054521

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  • Transport evidence for twin-boundary pinning of superconducting vortices in FeSe Reviewed

    Taichi Terashima, Hideaki Fujii, Yoshitaka Matsushita, Shinya Uji, Yuji Matsuda, Takasada Shibauchi, Shigeru Kasahara

    Physical Review B   2024.1

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevB.109.014518

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  • Evidence for an odd-parity nematic phase above the charge-density-wave transition in a kagome metal

    T. Asaba, A. Onishi, Y. Kageyama, T. Kiyosue, K. Ohtsuka, S. Suetsugu, Y. Kohsaka, T. Gaggl, Y. Kasahara, H. Murayama, K. Hashimoto, R. Tazai, H. Kontani, B. R. Ortiz, S. D. Wilson, Q. Li, H. -H. Wen, T. Shibauchi, Y. Matsuda

    Nature Physics   20 ( 1 )   40 - 46   2024.1

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    Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    DOI: 10.1038/s41567-023-02272-4

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    Other Link: https://www.nature.com/articles/s41567-023-02272-4

  • Unusual crossover from Bardeen-Cooper-Schrieffer to Bose-Einstein-condensate superconductivity in iron chalcogenides Reviewed

    Yuta Mizukami, Masahiro Haze, Ohei Tanaka, Kohei Matsuura, Daiki Sano, Jakob Böker, Ilya Eremin, Shigeru Kasahara, Yuji Matsuda, Takasada Shibauchi

    Communications Physics   2023.7

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1038/s42005-023-01289-8

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  • Spin fluctuations from Bogoliubov Fermi surfaces in the superconducting state of S-substituted FeSe Reviewed

    Zhongyu Yu, Koya Nakamura, Kazuya Inomata, Xiaoling Shen, Taketora Mikuri, Kohei Matsuura, Yuta Mizukami, Shigeru Kasahara, Yuji Matsuda, Takasada Shibauchi, Yoshiya Uwatoko, Naoki Fujiwara

    Communications Physics   6 ( 1 )   2023.7

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    Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    Abstract

    The study of the iron-based superconductor, FeSe, has resulted in various topics, such as the interplay among superconductivity, nematicity, and magnetism, Bardeen-Cooper-Schrieffer Bose-Einstein-condensation (BCS-BEC) crossover, and Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) superconductivity. Recently, topologically protected nodal Fermi surfaces, referred to as Bogoliubov Fermi surfaces (BFSs), have garnered much attention. A theoretical model for the S-substituted FeSe system demonstrated that BFSs can manifest under the conditions of spin-orbit coupling, multi-band systems, and superconductivity with time-reversal symmetry breaking. Here we report the observation of spin fluctuations originating from BFSs in the superconducting (SC) state via 77Se-nuclear magnetic resonance measurements to 100 mK. In a heavily S-substituted FeSe, we found an anomalous enhancement of low-energy spin fluctuations deep in the SC state, which cannot be explained by an impurity effect. Such unusual behavior implies the presence of significant spin fluctuations of Bogoliubov quasiparticles, which are associated with possible nesting properties between BFSs.

    DOI: 10.1038/s42005-023-01286-x

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    Other Link: https://www.nature.com/articles/s42005-023-01286-x

  • Expanded quantum vortex liquid regimes in the electron nematic superconductors FeSe1−xSx and FeSe1−xTex Reviewed

    M. Čulo, S. Licciardello, K. Ishida, K. Mukasa, J. Ayres, J. Buhot, Y.-T. Hsu, S. Imajo, M. W. Qiu, M. Saito, Y. Uezono, T. Otsuka, T. Watanabe, K. Kindo, T. Shibauchi, S. Kasahara, Y. Matsuda, N. E. Hussey

    Nature Communications   14 ( 1 )   4150-1 - 4150-9   2023.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    Abstract

    The quantum vortex liquid (QVL) is an intriguing state of type-II superconductors in which intense quantum fluctuations of the superconducting (SC) order parameter destroy the Abrikosov lattice even at very low temperatures. Such a state has only rarely been observed, however, and remains poorly understood. One of the key questions is the precise origin of such intense quantum fluctuations and the role of nearby non-SC phases or quantum critical points in amplifying these effects. Here we report a high-field magnetotransport study of FeSe1−xSx and FeSe1−xTex which show a broad QVL regime both within and beyond their respective electron nematic phases. A clear correlation is found between the extent of the QVL and the strength of the superconductivity. This comparative study enables us to identify the essential elements that promote the QVL regime in unconventional superconductors and to demonstrate that the QVL regime itself is most extended wherever superconductivity is weakest.

    DOI: 10.1038/s41467-023-39730-9

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    Other Link: https://www.nature.com/articles/s41467-023-39730-9

  • Enhanced Superconducting Pairing Strength near a Pure Nematic Quantum Critical Point Reviewed

    Kiyotaka Mukasa, Kousuke Ishida, Shusaku Imajo, Mingwei Qiu, Mikihiko Saito, Kohei Matsuura, Yuichi Sugimura, Supeng Liu, Yu Uezono, Takumi Otsuka, Matija Čulo, Shigeru Kasahara, Yuji Matsuda, Nigel E. Hussey, Takao Watanabe, Koichi Kindo, Takasada Shibauchi

    Physical Review X   13 ( 1 )   2023.3

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    Publishing type:Research paper (scientific journal)   Publisher:American Physical Society (APS)  

    DOI: 10.1103/physrevx.13.011032

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    Other Link: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevX.13.011032/fulltext

  • Resistivity and thermal conductivity of an organic insulator β′–EtMe3Sb[Pd(dmit)2]2 Reviewed

    Minoru Yamashita, Yuki Sato, Yuichi Kasahara, Shigeru Kasahara, Takasada Shibauchi, Yuji Matsuda

    Scientific Reports   12 ( 1 )   2022.12

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    Abstract

    A finite residual linear term in the thermal conductivity at zero temperature in insulating magnets indicates the presence of gapless excitations of itinerant quasiparticles, which has been observed in some candidate materials of quantum spin liquids (QSLs). In the organic triangular insulator β′–EtMe3Sb[Pd(dmit)2]2, a QSL candidate material, the low-temperature thermal conductivity depends on the cooling process and the finite residual term is observed only in samples with large thermal conductivity. Moreover, the cooling rate dependence is largely sample dependent. Here we find that, while the low-temperature thermal conductivity significantly depends on the cooling rate, the high-temperature resistivity is almost perfectly independent of the cooling rate. These results indicate that in the samples with the finite residual term, the mean free path of the quasiparticles that carry the heat at low temperatures is governed by disorders, whose characteristic length scale of the distribution is much longer than the electron mean free path that determines the high-temperature resistivity. This explains why recent X-ray diffraction and nuclear magnetic resonance measurements show no cooling rate dependence. Naturally, these measurements are unsuitable for detecting disorders of the length scale relevant for the thermal conductivity, just as they cannot determine the residual resistivity of metals. Present results indicate that very careful experiments are needed when discussing itinerant spin excitations in β′–EtMe3Sb[Pd(dmit)2]2.

    DOI: 10.1038/s41598-022-13155-8

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    Other Link: https://www.nature.com/articles/s41598-022-13155-8

  • Quantized and unquantized thermal Hall conductance of the Kitaev spin liquid candidate ?-RuCl3 Reviewed

    Y. Kasahara, S. Suetsugu, T. Asaba, S. Kasahara, T. Shibauchi, N. Kurita, H. Tanaka, Y. Matsuda

    PHYSICAL REVIEW B   106 ( 6 )   2022.8

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevB.106.L060410

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  • Transport evidence for decoupled nematic and magnetic criticality in iron chalcogenides Reviewed

    Jake Ayres, Matija Čulo, Jonathan Buhot, Bence Bernáth, Shigeru Kasahara, Yuji Matsuda, Takasada Shibauchi, Antony Carrington, Sven Friedemann, Nigel E. Hussey

    Communications Physics   2022.4

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1038/s42005-022-00873-8

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  • Intrinsic suppression of the topological thermal Hall effect in an exactly solvable quantum magnet Reviewed

    S. Suetsugu, T. Yokoi, K. Totsuka, T. Ono, I. Tanaka, S. Kasahara, Y. Kasahara, Z. Chengchao, H. Kageyama, Y. Matsuda

    Physical Review B   105 ( 2 )   2022.1

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    Publishing type:Research paper (scientific journal)   Publisher:American Physical Society (APS)  

    DOI: 10.1103/physrevb.105.024415

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    Other Link: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.105.024415/fulltext

  • Charge-neutral fermions and magnetic field-driven instability in insulating YbIr3Si7 Reviewed

    Y. Sato, S. Suetsugu, T. Tominaga, Y. Kasahara, S. Kasahara, T. Kobayashi, S. Kitagawa, K. Ishida, R. Peters, T. Shibauchi, A. H. Nevidomskyy, L. Qian, E. Morosan, Y. Matsuda

    NATURE COMMUNICATIONS   13 ( 1 )   2022.1

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1038/s41467-021-27541-9

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  • Quasiparticle Nodal Plane in the Fulde-Ferrell-Larkin-Ovchinnikov State of FeSe Reviewed

    S. Kasahara, H. Suzuki, T. Machida, Y. Sato, Y. Ukai, H. Murayama, S. Suetsugu, Y. Kasahara, T. Shibauchi, T. Hanaguri, Y. Matsuda

    Physical Review Letters   127 ( 25 )   2021.12

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevLett.127.257001

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  • Pressure-induced reconstitution of Fermi surfaces and spin fluctuations in S-substituted FeSe Reviewed

    T. Kuwayama, K. Matsuura, J. Gouchi, Y. Yamakawa, Y. Mizukami, S. Kasahara, Y. Matsuda, T. Shibauchi, H. Kontani, Y. Uwatoko, N. Fujiwara

    Scientific Reports   11 ( 1 )   2021.12

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    Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    Abstract

    FeSe is a unique high-$$T_c$$ iron-based superconductor in which nematicity, superconductivity, and magnetism are entangled with each other in the P-T phase diagram. We performed $$^{77}$$Se-nuclear magnetic resonance measurements under pressures of up to 3.9 GPa on 12% S-substituted FeSe, in which the complex overlap between the nematicity and magnetism are resolved. A pressure-induced Lifshitz transition was observed at 1.0 GPa as an anomaly of the density of states and as double superconducting (SC) domes accompanied by different types of antiferromagnetic (AF) fluctuations. The low-$$T_{\mathrm{c } }$$ SC dome below 1 GPa is accompanied by strong AF fluctuations, whereas the high-$$T_{\mathrm{c } }$$ SC dome develops above 1 GPa, where AF fluctuations are fairly weak. These results suggest the importance of the $$d_{xy}$$ orbital and its intra-orbital coupling for the high-$$T_{\mathrm{c } }$$ superconductivity.

    DOI: 10.1038/s41598-021-96277-9

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    Other Link: https://www.nature.com/articles/s41598-021-96277-9

  • Discovery of mesoscopic nematicity wave in iron-based superconductors Reviewed

    T. Shimojima, Y. Motoyui, T. Taniuchi, C. Bareille, S. Onari, H. Kontani, M. Nakajima, S. Kasahara, T. Shibauchi, Y. Matsuda, S. Shin

    Science   373 ( 6559 )   1122 - 1125   2021.9

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    Publishing type:Research paper (scientific journal)   Publisher:American Association for the Advancement of Science (AAAS)  

    DOI: 10.1126/science.abd6701

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  • Observation of a superconducting state of a topological superconductor candidate, FeTe0.6Se0.4, equipping ferromagnetic electrodes with perpendicular magnetic anisotropy Reviewed

    Kosuke Ohnishi, Sachin Gupta, Shigeru Kasahara, Yuichi Kasahara, Yuji Matsuda, Ei Shigematsu, Ryo Ohshima, Yuichiro Ando, Masashi Shiraishi

    Applied Physics Express   14 ( 9 )   093002 - 093002   2021.9

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    Publishing type:Research paper (scientific journal)   Publisher:{IOP} Publishing  

    DOI: 10.35848/1882-0786/ac1ca4

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    Other Link: https://iopscience.iop.org/article/10.35848/1882-0786/ac1ca4/pdf

  • Description of Resonant Inelastic X-Ray Scattering in Correlated Metals Reviewed

    Keith Gilmore, Jonathan Pelliciari, Yaobo Huang, Joshua J. Kas, Marcus Dantz, Vladimir N. Strocov, Shigeru Kasahara, Yuji Matsuda, Tanmoy Das, Takasada Shibauchi, Thorsten Schmitt

    Physical Review X   11 ( 3 )   2021.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Physical Society  

    DOI: 10.1103/PhysRevX.11.031013

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  • Half-integer quantized anomalous thermal Hall effect in the Kitaev material candidate α-RuCl 3 Reviewed

    T. Yokoi, S. Ma, Y. Kasahara, S. Kasahara, T. Shibauchi, N. Kurita, H. Tanaka, J. Nasu, Y. Motome, C. Hickey, S. Trebst, Y. Matsuda

    Science   373 ( 6554 )   568 - 572   2021.7

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    Publishing type:Research paper (scientific journal)   Publisher:American Association for the Advancement of Science ({AAAS})  

    DOI: 10.1126/science.aay5551

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  • Quadrupolar charge dynamics in the nonmagnetic FeSe1−xSx superconductors Reviewed

    Weilu Zhang, Shangfei Wu, Shigeru Kasahara, Takasada Shibauchi, Yuji Matsuda, Girsh Blumberg

    Proceedings of the National Academy of Sciences   118 ( 20 )   e2020585118 - e2020585118   2021.5

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    Publishing type:Research paper (scientific journal)   Publisher:Proceedings of the National Academy of Sciences  

    We use polarization-resolved electronic Raman spectroscopy to study quadrupolar charge dynamics in a nonmagnetic <inline-formula><m:math xmlns:m="http://www.w3.org/1998/Math/MathML" overflow="scroll"><m:msub><m:mrow><m:mi mathvariant="normal">F</m:mi><m:mi mathvariant="normal">e</m:mi><m:mi mathvariant="normal">S</m:mi><m:mi mathvariant="normal">e</m:mi></m:mrow><m:mrow><m:mn>1</m:mn><m:mo>−</m:mo><m:mi>x</m:mi></m:mrow></m:msub><m:msub><m:mrow><m:mi mathvariant="normal">S</m:mi></m:mrow><m:mrow><m:mi>x</m:mi></m:mrow></m:msub></m:math></inline-formula> superconductor. We observe two types of long-wavelength <inline-formula><m:math xmlns:m="http://www.w3.org/1998/Math/MathML" overflow="scroll"><m:mi>X</m:mi><m:mi>Y</m:mi></m:math></inline-formula> symmetry excitations: 1) a low-energy quasi-elastic scattering peak (QEP) and 2) a broad electronic continuum with a maximum at 55 meV. Below the tetragonal-to-orthorhombic structural transition at <inline-formula><m:math xmlns:m="http://www.w3.org/1998/Math/MathML" overflow="scroll"><m:msub><m:mrow><m:mi>T</m:mi></m:mrow><m:mrow><m:mi>S</m:mi></m:mrow></m:msub><m:mrow><m:mo>(</m:mo><m:mrow><m:mi>x</m:mi></m:mrow><m:mo>)</m:mo></m:mrow></m:math></inline-formula>, a pseudogap suppression with temperature dependence reminiscent of the nematic order parameter develops in the <inline-formula><m:math xmlns:m="http://www.w3.org/1998/Math/MathML" overflow="scroll"><m:mi>X</m:mi><m:mi>Y</m:mi></m:math></inline-formula> symmetry spectra of the electronic excitation continuum. The QEP exhibits critical enhancement upon cooling toward <inline-formula><m:math xmlns:m="http://www.w3.org/1998/Math/MathML" overflow="scroll"><m:msub><m:mrow><m:mi>T</m:mi></m:mrow><m:mrow><m:mi>S</m:mi></m:mrow></m:msub><m:mrow><m:mo>(</m:mo><m:mrow><m:mi>x</m:mi></m:mrow><m:mo>)</m:mo></m:mrow></m:math></inline-formula>. The intensity of the QEP grows with increasing sulfur concentration x and maximizes near critical concentration <inline-formula><m:math xmlns:m="http://www.w3.org/1998/Math/MathML" overflow="scroll"><m:msub><m:mrow><m:mi>x</m:mi></m:mrow><m:mrow><m:mi>c</m:mi><m:mi>r</m:mi></m:mrow></m:msub><m:mo>≈</m:mo><m:mn>0.16</m:mn></m:math></inline-formula>, while the pseudogap size decreases with the suppression of <inline-formula><m:math xmlns:m="http://www.w3.org/1998/Math/MathML" overflow="scroll"><m:msub><m:mrow><m:mi>T</m:mi></m:mrow><m:mrow><m:mi>S</m:mi></m:mrow></m:msub><m:mrow><m:mo>(</m:mo><m:mrow><m:mi>x</m:mi></m:mrow><m:mo>)</m:mo></m:mrow></m:math></inline-formula>. We interpret the development of the pseudogap in the quadrupole scattering channel as a manifestation of transition from the non-Fermi liquid regime, dominated by strong Pomeranchuk-like fluctuations giving rise to intense electronic continuum of excitations in the fourfold symmetric high-temperature phase, to the Fermi liquid regime in the broken-symmetry nematic phase where the quadrupole fluctuations are suppressed.

    DOI: 10.1073/pnas.2020585118

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    Other Link: https://syndication.highwire.org/content/doi/10.1073/pnas.2020585118

  • Putative Hall response of the strange metal component in FeSe1−xSx Reviewed

    M. Čulo, M. Berben, Y.-T. Hsu, J. Ayres, R. D. H. Hinlopen, S. Kasahara, Y. Matsuda, T. Shibauchi, N. E. Hussey

    Physical Review Research   3 ( 2 )   2021.4

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    Publishing type:Research paper (scientific journal)   Publisher:American Physical Society (APS)  

    DOI: 10.1103/physrevresearch.3.023069

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    Other Link: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevResearch.3.023069/fulltext

  • Bond Directional Anapole Order in a Spin-Orbit Coupled Mott Insulator Sr2(Ir1−xRhx)O4 Reviewed

    H. Murayama, K. Ishida, R. Kurihara, T. Ono, Y. Sato, Y. Kasahara, H. Watanabe, Y. Yanase, G. Cao, Y. Mizukami, T. Shibauchi, Y. Matsuda, S. Kasahara

    Physical Review X   11 ( 1 )   2021.2

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    Publishing type:Research paper (scientific journal)   Publisher:American Physical Society (APS)  

    DOI: 10.1103/physrevx.11.011021

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    Other Link: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevX.11.011021/fulltext

  • Bose-Einstein condensation superconductivity induced by disappearance of the nematic state Reviewed

    Takahiro Hashimoto, Yuichi Ota, Akihiro Tsuzuki, Tsubaki Nagashima, Akiko Fukushima, Shigeru Kasahara, Yuji Matsuda, Kohei Matsuura, Yuta Mizukami, Takasada Shibauchi, Shik Shin, Kozo Okazaki

    Science Advances   6 ( 45 )   2020.11

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1126/SCIADV.ABB9052

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  • Non-Fermi liquid transport in the vicinity of the nematic quantum critical point of superconducting FeSe1−xSx Reviewed

    W. K. Huang, S. Hosoi, M. Čulo, S. Kasahara, Y. Sato, K. Matsuura, Y. Mizukami, M. Berben, N. E. Hussey, H. Kontani, T. Shibauchi, Y. Matsuda

    Physical Review Research   2 ( 3 )   2020.9

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    Publishing type:Research paper (scientific journal)   Publisher:American Physical Society (APS)  

    DOI: 10.1103/physrevresearch.2.033367

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    Other Link: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevResearch.2.033367/fulltext

  • In-plane electronic anisotropy resulted from ordered magnetic moment in iron-based superconductors Reviewed

    S.-F. Wu, W.-L. Zhang, V. K. Thorsmølle, G. F. Chen, G. T. Tan, P. C. Dai, Y. G. Shi, C. Q. Jin, T. Shibauchi, S. Kasahara, Y. Matsuda, A. S. Sefat, H. Ding, P. Richard, G. Blumberg

    Physical Review Research   2 ( 3 )   2020.7

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    Publishing type:Research paper (scientific journal)   Publisher:American Physical Society (APS)  

    DOI: 10.1103/physrevresearch.2.033140

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    Other Link: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevResearch.2.033140/fulltext

  • NMR study under pressure on the iron-based superconductor FeSe1−xSx (x = 0.12 and 0.23): Relationship between nematicity and AF fluctuations Reviewed

    T. Kuwayama, K. Matsuura, Y. Mizukami, S. Kasahara, Y. Matsuda, T. Shibauchi, Y. Uwatoko, N. Fujiwara

    Modern Physics Letters B   2040048 - 2040048   2020.6

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    Publishing type:Research paper (scientific journal)   Publisher:World Scientific Pub Co Pte Lt  

    We performed [Formula: see text]-nuclear magnetic resonance measurements on [Formula: see text] ([Formula: see text] = 0.12 and 0.23). We found from the relaxation time [Formula: see text] that nematicity and antiferromagnetic fluctuations show cooperative coupling.

    DOI: 10.1142/s0217984920400485

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  • Presence and absence of itinerant gapless excitations in the quantum spin liquid candidate EtMe3Sb[Pd(dmit)2]2 Reviewed

    M. Yamashita, Y. Sato, T. Tominaga, Y. Kasahara, S. Kasahara, H. Cui, R. Kato, T. Shibauchi, Y. Matsuda

    Physical Review B   2020.4

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevB.101.140407

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  • Evidence for an Fulde-Ferrell-Larkin-Ovchinnikov State with Segmented Vortices in the BCS-BEC-Crossover Superconductor FeSe Reviewed

    S. Kasahara, Y. Sato, S. Licciardello, M. Čulo, S. Arsenijević, T. Ottenbros, T. Tominaga, J. Böker, I. Eremin, T. Shibauchi, J. Wosnitza, N. E. Hussey, Y. Matsuda

    Physical Review Letters   2020.3

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevLett.124.107001

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  • Effect of quenched disorder on the quantum spin liquid state of the triangular-lattice antiferromagnet 1T−TaS2 Reviewed

    H. Murayama, Y. Sato, T. Taniguchi, R. Kurihara, X. Z. Xing, W. Huang, S. Kasahara, Y. Kasahara, I. Kimchi, M. Yoshida, Y. Iwasa, Y. Mizukami, T. Shibauchi, M. Konczykowski, Y. Matsuda

    Physical Review Research   2 ( 1 )   2020.1

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  • Measuring magnetic field texture in correlated electron systems under extreme conditions Reviewed

    King Yau Yip, Kin On Ho, King Yiu Yu, Yang Chen, Wei Zhang, S. Kasahara, Y. Mizukami, T. Shibauchi, Y. Matsuda, Swee K. Goh, Sen Yang

    Science   366 ( 6471 )   1355 - 1359   2019.12

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    DOI: 10.1126/science.aaw4278

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  • Reciprocity between local moments and collective magnetic excitations in the phase diagram of BaFe<inf>2</inf>(As<inf>1−x</inf>P<inf> x</inf>)<inf>2</inf> Reviewed

    Jonathan Pelliciari, Kenji Ishii, Yaobo Huang, Marcus Dantz, Xingye Lu, Paul Olalde-Velasco, Vladimir N. Strocov, Shigeru Kasahara, Lingyi Xing, Xiancheng Wang, Changqing Jin, Yuji Matsuda, Takasada Shibauchi, Tanmoy Das, Thorsten Schmitt

    Communications Physics   2 ( 1 )   2019.12

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    DOI: 10.1038/s42005-019-0236-3

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  • Photoinduced possible superconducting state with long-lived disproportionate band filling in FeSe Reviewed

    Takeshi Suzuki, Takashi Someya, Takahiro Hashimoto, Shoya Michimae, Mari Watanabe, Masami Fujisawa, Teruto Kanai, Nobuhisa Ishii, Jiro Itatani, Shigeru Kasahara, Yuji Matsuda, Takasada Shibauchi, Kozo Okazaki, Shik Shin

    Communications Physics   2   115   2019.12

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    DOI: 10.1038/s42005-019-0219-4

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  • Unconventional thermal metallic state of charge-neutral fermions in an insulator Reviewed

    Sato, Y., Xiang, Z., Kasahara, Y., Taniguchi, T., Kasahara, S., Chen, L., Asaba, T., Tinsman, C., Murayama, H., Tanaka, O., Mizukami, Y., Shibauchi, T., Iga, F., Singleton, J., Li, L., Matsuda, Y.

    Nature Physics   15 ( 9 )   954 - 959   2019.9

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    DOI: 10.1038/s41567-019-0552-2

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  • Coexistence of orbital and quantum critical magnetoresistance in FeSe 1 − x S x Reviewed

    S. Licciardello, N. Maksimovic, J. Ayres, J. Buhot, M. Čulo, B. Bryant, S. Kasahara, Y. Matsuda, T. Shibauchi, V. Nagarajan, J. G. Analytis, N. E. Hussey

    Physical Review Research   1   023011   2019.9

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  • Universal relationship between low-energy antiferromagnetic fluctuations and superconductivity in BaFe2(As1-x Px)2 Reviewed

    Kitagawa, S., Kawamura, T., Ishida, K., Mizukami, Y., Kasahara, S., Shibauchi, T., Terashima, T., Matsuda, Y.

    Physical Review B   100 ( 6 )   2019.8

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  • Diagonal nematicity in the pseudogap phase of HgBa<inf>2</inf>CuO<inf>4+δ</inf> Reviewed

    Murayama, H., Sato, Y., Kurihara, R., Kasahara, S., Mizukami, Y., Kasahara, Y., Uchiyama, H., Yamamoto, A., Moon, E.-G., Cai, J., Freyermuth, J., Greven, M., Shibauchi, T., Matsuda, Y.

    Nature Communications   10 ( 1 )   3282   2019.7

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    DOI: 10.1038/s41467-019-11200-1

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  • Ultrafast nematic-orbital excitation in FeSe Reviewed

    T. Shimojima, Y. Suzuki, A. Nakamura, N. Mitsuishi, S. Kasahara, T. Shibauchi, Y. Matsuda, Y. Ishida, S. Shin, K. Ishizaka

    Nature Communications   10 ( 1 )   1946   2019.4

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    DOI: 10.1038/s41467-019-09869-5

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  • Se-77-NMR Study under Pressure on 12%-S Doped FeSe Reviewed

    Kuwayama Takanori, Matsuura Kohei, Mizukami Yuta, Kasahara Shigeru, Matsuda Yuji, Shibauchi Takasada, Uwatoko Yoshiya, Fujiwara Naoki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   88 ( 3 )   2019.3

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    DOI: 10.7566/JPSJ.88.033703

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  • Evolution of the low-temperature Fermi surface of superconducting FeSe<inf>1−x</inf>S<inf>x</inf> across a nematic phase transition Reviewed

    Coldea, A.I., Blake, S.F., Kasahara, S., Haghighirad, A.A., Watson, M.D., Knafo, W., Choi, E.S., McCollam, A., Reiss, P., Yamashita, T., Bruma, M., Speller, S.C., Matsuda, Y., Wolf, T., Shibauchi, T., Schofield, A.J.

    npj Quantum Materials   4 ( 1 )   2   2019.1

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    DOI: 10.1038/s41535-018-0141-0

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  • Pressure-induced lifshitz transition in fese<inf>0:88</inf>s<inf>0:12</inf> probed via77se-NMR Reviewed

    Kuwayama T, Matsuura K, Mizukami Y, Kasahara S, Matsuda Y, Shibauchi T, Uwatoko Y, Fujiwara N

    Papers in Physics   11   2019

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    DOI: 10.4279/PIP.110003

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  • Quantum Vortex Core and Missing Pseudogap in the Multiband BCS-BEC Crossover Superconductor FeSe Reviewed

    Hanaguri T, Kasahara S, Boeker J, Eremin I, Shibauchi T, Matsuda Y

    Physical Review Letters   122 ( 7 )   077001   2019

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    DOI: 10.1103/PhysRevLett.122.077001

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  • Electrical resistivity across a nematic quantum critical point Reviewed

    Licciardello, S., Buhot, J., Lu, J., Ayres, J., Kasahara, S., Matsuda, Y., Shibauchi, T., Hussey, N.E.

    Nature   567 ( 7747 )   213 - 217   2019

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    DOI: 10.1038/s41586-019-0923-y

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  • STM measurement on electric structure in tetragonal phase of Fe(Se,S)

    Sano D., Suematsu T., Naritsuka M., Haze M., Taniguchi T., Kasahara S., Kasahara Y., Shibauchi T., Hanaguri T., Matsuda Y.

    Meeting Abstracts of the Physical Society of Japan   74.1   1952 - 1952   2019

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    DOI: 10.11316/jpsgaiyo.74.1.0_1952

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  • Superconducting gap anisotropy sensitive to nematic domains in FeSe Reviewed

    Takahiro Hashimoto, Yuichi Ota, Haruyoshi Q. Yamamoto, Yuya Suzuki, Takahiro Shimojima, Shuntaro Watanabe, Chuangtian Chen, Shigeru Kasahara, Yuji Matsuda, Takasada Shibauchi, Kozo Okazaki, Shik Shin

    Nature Communications   9 ( 1 )   282   2018.12

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    DOI: 10.1038/s41467-017-02739-y

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  • Magnetic fluctuations under pressure on S-doped FeSe studied via Se-77 NMR Reviewed

    Kuwayama Takanori, Matsuura Kohei, Mizukami Yuta, Kasahara Shigeru, Matsuda Yuji, Shibauchi Takasada, Uwatoko Yoshiya, Fujiwara Naoki

    AIP ADVANCES   8 ( 10 )   2018.10

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    DOI: 10.1063/1.5042570

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  • Quantum oscillations of electrical resistivity in an insulator Reviewed International journal

    Z. Xiang, Y. Kasahara, T. Asaba, B. Lawson, C. Tinsman, Lu Chen, K. Sugimoto, S. Kawaguchi, Y. Sato, G. Li, S. Yao, Y. L. Chen, F. Iga, John Singleton, Y. Matsuda, Lu Li

    Science   362 ( issue 6410 )   65 - 69   2018.8

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    In metals, orbital motions of conduction electrons on the Fermi surface are quantized in magnetic fields, which is manifested by quantum oscillations in electrical resistivity. This Landau quantization is generally absent in insulators. Here, we report a notable exception in an insulator—ytterbium dodecaboride (YbB12). The resistivity of YbB12, which is of a much larger magnitude than the resistivity in metals, exhibits distinct quantum oscillations. These unconventional oscillations arise from the insulating bulk, even though the temperature dependence of the oscillation amplitude follows the conventional Fermi liquid theory of metals with a large effective mass. Quantum oscillations in the magnetic torque are also observed, albeit with a lighter effective mass.

    DOI: 10.1126/science.aap9607

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  • Majorana quantization and half-integer thermal quantum Hall effect in a Kitaev spin liquid Reviewed

    Kasahara Y, Ohnishi T, Mizukami Y, Tanaka O, Ma Sixiao, Sugii K, Kurita N, Tanaka H, Nasu J, Motome Y, Shibauchi T, Matsuda Y

    NATURE   559 ( 7713 )   227 - +   2018.7

  • Two distinct superconducting pairing states divided by the nematic end point in FeSe1-xSx Reviewed

    Hanaguri, Tetsuo, Iwaya, Katsuya, Kohsaka, Yuhki, Machida, Tadashi, Watashige, Tatsuya, Kasahara, Shigeru, Shibauchi, Takasada, Matsuda, Yuji

    SCIENCE ADVANCES   4 ( 5 )   eaar6419   2018.5

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  • Abrupt change of the superconducting gap structure at the nematic critical point in FeSe1-xSx Reviewed

    Yuki Sato, Shigeru Kasahara, Tomoya Taniguchi, Xiangzhuo Xing, Yuichi Kasahara, Yoshifumi Tokiwa, Youichi Yamakawa, Hiroshi Kontani, Takasada Shibauchi, Yuji Matsuda

    PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA   115 ( 6 )   1227 - 1231   2018.2

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    DOI: 10.1073/pnas.1717331115

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  • In situ STM observation of nonmagnetic impurity effect in MBE-grown CeCoIn5 films Reviewed

    Masahiro Haze, Yohei Torii, Robert Peters, Shigeru Kasahara, Yuichi Kasahara, Takasada Shibauchi, Takahito Terashima, Yuji Matsuda

    Journal of the Physical Society of Japan   87 ( 3 )   2018

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    DOI: 10.7566/JPSJ.87.034702

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  • 77Se NMR study near the magnetic orderded state on FeSe1-xSx(x = 0.12) under high pressure

    Kuwayama T., Matsuura K., Mizugami Y., Kasahara S., Matsuda Y., Shibauchi T., Uwatoko Y., Fujiwara N.

    Meeting Abstracts of the Physical Society of Japan   73 ( 0 )   1390 - 1390   2018

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    DOI: 10.11316/jpsgaiyo.73.2.0_1390

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  • Thermodynamic evidence for a nematic phase transition at the onset of the pseudogap in YBa2Cu3Oy Reviewed

    Y. Sato, S. Kasahara, H. Murayama, Y. Kasahara, E. -G. Moon, T. Nishizaki, T. Loew, J. Porras, B. Keimer, T. Shibauchi, Y. Matsuda

    NATURE PHYSICS   13 ( 11 )   1074 - +   2017.11

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    DOI: 10.1038/nphys4205

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  • Maximizing T-c by tuning nematicity and magnetism in FeSe1-xSx superconductors Reviewed

    K. Matsuura, Y. Mizukami, Y. Arai, Y. Sugimura, N. Maejima, A. Machida, T. Watanuki, T. Fukuda, T. Yajima, Z. Hiroi, K. Y. Yip, Y. C. Chan, Q. Niu, S. Hosoi, K. Ishida, K. Mukasa, S. Kasahara, J. -G. Cheng, S. K. Goh, Y. Matsuda, Y. Uwatoko, T. Shibauchi

    NATURE COMMUNICATIONS   8 ( 1 )   1143   2017.10

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  • Impact of Disorder on the Superconducting Phase Diagram in BaFe2(As1-xPx)(2) Reviewed

    Yuta Mizukami, Marcin Konczykowski, Kohei Matsuura, Tatsuya Watashige, Shigeru Kasahara, Yuji Matsuda, Takasada Shibauchi

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   86 ( 8 )   2017.8

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    DOI: 10.7566/JPSJ.86.083706

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  • Weakening of the diamagnetic shielding in FeSe1-xSx at high pressures Reviewed

    K. Y. Yip, Y. C. Chan, Q. Niu, K. Matsuura, Y. Mizukami, S. Kasahara, Y. Matsuda, T. Shibauchi, Swee K. Goh

    PHYSICAL REVIEW B   96 ( 2 )   2017.7

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    DOI: 10.1103/PhysRevB.96.020502

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  • Quasiparticle Excitations in the Superconducting State of FeSe Probed by Thermal Hall Conductivity in the Vicinity of the BCS-BEC Crossover Reviewed

    Tatsuya Watashige, Stevan Arsenijevic, Takuya Yamashita, Daiki Terazawa, Takafumi Onishi, Lars Opherden, Shigeru Kasahara, Yoshifumi Tokiwa, Yuichi Kasahara, Takasada Shibauchi, Hilbert von Loehneysen, Jochen Wosnitza, Yuji Matsuda

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   86 ( 1 )   2017.1

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  • Giant superconducting fluctuations in the compensated semimetal FeSe at the BCS-BEC crossover Reviewed

    S. Kasahara, T. Yamashita, A. Shi, R. Kobayashi, Y. Shimoyama, T. Watashige, K. Ishida, T. Terashima, T. Wolf, F. Hardy, C. Meingast, H. Von Loehneysen, A. Levchenko, T. Shibauchi, Y. Matsuda

    NATURE COMMUNICATIONS   7   12843   2016.9

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  • Diamagnetic vortex barrier stripes in underdoped BaFe2(As1-xPx)(2)

    A. Yagil, Y. Lamhot, A. Almoalem, S. Kasahara, T. Watashige, T. Shibauchi, Y. Matsuda, O. M. Auslaender

    PHYSICAL REVIEW B   94 ( 6 )   2016.8

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    DOI: 10.1103/PhysRevB.94.064510

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  • Charge-induced nematicity in FeSe Reviewed

    Pierre Massat, Donato Farina, Indranil Paul, Sandra Karlsson, Pierre Strobel, Pierre Toulemonde, Marie-Aude Measson, Maximilien Cazayous, Alain Sacuto, Shigeru Kasahara, Takasada Shibauchi, Yuji Matsuda, Yann Gallais

    PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA   113 ( 33 )   9177 - 9181   2016.8

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    DOI: 10.1073/pnas.1606562113

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  • Nematic quantum critical point without magnetism in FeSe1-xSx superconductors Reviewed

    Suguru Hosoi, Kohei Matsuura, Kousuke Ishida, Hao Wang, Yuta Mizukami, Tatsuya Watashige, Shigeru Kasahara, Yuji Matsuda, Takasada Shibauchi

    PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA   113 ( 29 )   8139 - 8143   2016.7

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    DOI: 10.1073/pnas.1605806113

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  • Dome-shaped magnetic order competing with high-temperature superconductivity at high pressures in FeSe Reviewed

    J. P. Sun, K. Matsuura, G. Z. Ye, Y. Mizukami, M. Shimozawa, K. Matsubayashi, M. Yamashita, T. Watashige, S. Kasahara, Y. Matsuda, J-Q. Yan, B. C. Sales, Y. Uwatoko, J-G. Cheng, T. Shibauchi

    NATURE COMMUNICATIONS   7   12146   2016.7

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  • Magnetotransport study of the pressure-induced antiferromagnetic phase in FeSe Reviewed

    Terashima, T., Kikugawa, N., Kasahara, S., Watashige, T., Matsuda, Y., Shibauchi, T., Uji, S.

    Physical Review B   93 ( 18 )   2016.5

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    DOI: 10.1103/PhysRevB.93.180503

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  • Magnetotransport study of the pressure-induced antiferromagnetic phase in FeSe Reviewed

    Taichi Terashima, Naoki Kikugawa, Shigeru Kasahara, Tatsuya Watashige, Yuji Matsuda, Takasada Shibauchi, Shinya Uji

    PHYSICAL REVIEW B   93 ( 18 )   2016.5

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  • Fermi surface reconstruction in FeSe under high pressure

    Terashima, T., Kikugawa, N., Kisw, hi, A., Graf, D., Choi, E.-S., Brooks, J.S., Kasahara, S., Watashige, T., Matsuda, Y., Shibauchi, T., Wolf, T., B{\"o}hmer, A.E., Hardy, F., Meingast, C., L{\"o}hneysen, H.V., Uji, S.

    Physical Review B   93 ( 9 )   2016.3

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    DOI: 10.1103/PhysRevB.93.094505

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  • Fermi surface reconstruction in FeSe under high pressure Reviewed

    Taichi Terashima, Naoki Kikugawa, Andhika Kiswandhi, David Graf, Eun-Sang Choi, James S. Brooks, Shigeru Kasahara, Tatsuya Watashige, Yuji Matsuda, Takasada Shibauchi, Thomas Wolf, Anna E. Boehmer, Frederic Hardy, Christoph Meingast, Hilbert V. Loehneysen, Shinya Uji

    PHYSICAL REVIEW B   93 ( 9 )   2016.3

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  • Nematic magnetoelastic effect contrasted between Ba(Fe1-xCox)2As2 and FeSe Reviewed

    Hu, Y., Ren, X., Zhang, R., Luo, H., Kasahara, S., Watashige, T., Shibauchi, T., Dai, P., Zhang, Y., Matsuda, Y., Li, Y.

    Physical Review B   93 ( 6 )   2016.2

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  • Fermi surface reconstruction in FeSe under high pressure Reviewed

    Terashima, Taichi, Kikugawa, Naoki, Kisw, hi, Andhika, Graf, David, Choi, Eun-Sang, Brooks, James S., Kasahara, Shigeru, Watashige, Tatsuya, Matsuda, Yuji, Shibauchi, Takasada, Wolf, Thomas, Boehmer, Anna E., Hardy, Frederic, Meingast, Christoph, Loehneysen, Hilbert V., Uji, Shinya

    Physical Review B   93 ( 9 )   2016

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  • Spin nematic susceptibility studied by inelastic neutron scattering in FeSe

    S. Shamoto, K. Matsuoka, R. Kajimoto, M. Ishikado, Y. Yamakawa, T. Watashige, S. Kasahara, M. Nakamura, H. Kontani, T. Shibauchi, Y. Matsuda

    2015.11

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    Mechanism of unconventional superconductivity in FeSe has been intensely<br />
    scrutinized recently because of a variety of exotic properties unprecedented<br />
    for other iron-based superconductors. A central unanswered question concerns<br />
    the origin of the interaction that causes the nematic transition at $T_s=90\,K$<br />
    without accompanying magnetic order. Elucidating the nature of spin excitations<br />
    in the normal state is a key to addressing this issue. Here we report, from<br />
    inelastic neutron-scattering measurements in FeSe single crystals, that<br />
    high-energy spin excitation spectra of FeSe exhibit characteristic energy<br />
    dependence with missing intensity at around 70-80$\,$meV, which are very<br />
    different from other iron-based superconductors. Despite of the strongest<br />
    electron correlations among the iron-based superconductor family, the spectra<br />
    are qualitatively at variance with the local moment model and can be<br />
    essentially described by the itinerant electron picture. Moreover, the<br />
    dynamical spin susceptibility above $T_s$ is only weakly temperature dependent,<br />
    which is in stark contrast to the Curie-Weiss behavior of the electronic<br />
    nematic susceptibility, suggesting that the nematic transition is not driven by<br />
    spin but by orbital degrees of freedom.

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  • Publisher's Note: Dichotomy between the Hole and Electron Behavior in Multiband Superconductor FeSe Probed by Ultrahigh Magnetic Fields (vol 115, 027006, 2015) Reviewed

    M. D. Watson, T. Yamashita, S. Kasahara, W. Knafo, M. Nardone, J. Beard, F. Hardy, A. McCollam, A. Narayanan, S. F. Blake, T. Wolf, A. A. Haghighirad, C. Meingast, A. J. Schofield, H. V. Loehneysen, Y. Matsuda, A. I. Coldea, T. Shibauchi

    PHYSICAL REVIEW LETTERS   115 ( 21 )   219902   2015.11

  • Momentum-dependent sign inversion of orbital order in superconducting FeSe Reviewed

    Y. Suzuki, T. Shimojima, T. Sonobe, A. Nakamura, M. Sakano, H. Tsuji, J. Omachi, K. Yoshioka, M. Kuwata-Gonokami, T. Watashige, R. Kobayashi, S. Kasahara, T. Shibauchi, Y. Matsuda, Y. Yamakawa, H. Kontani, K. Ishizaka

    PHYSICAL REVIEW B   92 ( 20 )   2015.11

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  • Enhancement of critical current density and mechanism of vortex pinning in H+-irradiated FeSe single crystal Reviewed

    Yue Sun, Sunseng Pyon, Tsuyoshi Tamegai, Ryo Kobayashi, Tatsuya Watashige, Shigeru Kasahara, Yuji Matsuda, Takasada Shibauchi, Hisashi Kitamura

    APPLIED PHYSICS EXPRESS   8 ( 11 )   1 - 113102   2015.11

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  • Nematic magnetoelastic effect contrasted between Ba(Fe$_{1-x}$Co$_{x}$)$_2$As$_2$ and FeSe Reviewed

    Yuwen Hu, Xiao Ren, Rui Zhang, Huiqian Luo, Shigeru Kasahara, Tatsuya Watashige, Takasada Shibauchi, Pengcheng Dai, Yan Zhang, Yuji Matsuda, Yuan Li

    Phys. Rev. B 93, 060504(R) (2016)   93 ( 6 )   2015.10

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  • Critical current density, vortex dynamics, and phase diagram of single-crystal FeSe Reviewed

    Yue Sun, Sunseng Pyon, Tsuyoshi Tamegai, Ryo Kobayashi, Tatsuya Watashige, Shigeru Kasahara, Yuji Matsuda, Takasada Shibauchi

    PHYSICAL REVIEW B   92 ( 14 )   1 - 144509   2015.10

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  • Dichotomy between the Hole and Electron Behavior in Multiband Superconductor FeSe Probed by Ultrahigh Magnetic Fields Reviewed

    M. D. Watson, T. Yamashita, S. Kasahara, W. Knafo, M. Nardone, J. Beard, F. Hardy, A. McCollam, A. Narayanan, S. F. Blake, T. Wolf, A. A. Haghighirad, C. Meingast, A. J. Schofield, H. v. Loehneysen, Y. Matsuda, A. I. Coldea, T. Shibauchi

    PHYSICAL REVIEW LETTERS   115 ( 2 )   1 - 27006   2015.7

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  • Pressure-Induced Antiferromagnetic Transition and Phase Diagram in FeSe Reviewed

    Taichi Terashima, Naoki Kikugawa, Shigeru Kasahara, Tatsuya Watashige, Takasada Shibauchi, Yuji Matsuda, Thomas Wolf, Anna E. Boehmer, Frederic Hardy, Christoph Meingast, Hilbert v. Loehneysen, Shinya Uji

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   84 ( 6 )   1 - 63701   2015.6

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    DOI: 10.7566/JPSJ.84.063701

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  • Optical conductivity evidence of clean-limit superconductivity in LiFeAs Reviewed

    R. P. S. M. Lobo, G. Chanda, A. V. Pronin, J. Wosnitza, S. Kasahara, T. Shibauchi, Y. Matsuda

    PHYSICAL REVIEW B   91 ( 17 )   2015.5

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    DOI: 10.1103/PhysRevB.91.174509

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  • Emergence of Orbital Nematicity in the Tetragonal Phase of BaFe2(As1-xPx)(2) Reviewed

    Tetsuya Iye, Marc-Henri Julien, Hadrien Mayaffre, Mladen Horvatic, Claude Berthier, Kenji Ishida, Hiroaki Ikeda, Shigeru Kasahara, Takasada Shibauchi, Yuji Matsuda

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   84 ( 4 )   1 - 43705   2015.4

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    DOI: 10.7566/JPSJ.84.043705

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  • Fermi surface of IrTe2 in the valence-bond state as determined by quantum oscillations Reviewed

    S. F. Blake, M. D. Watson, A. McCollam, S. Kasahara, R. D. Johnson, A. Narayanan, G. L. Pascut, K. Haule, V. Kiryukhin, T. Yamashita, D. Watanabe, T. Shibauchi, Y. Matsuda, A. I. Coldea

    PHYSICAL REVIEW B   91 ( 12 )   2015.3

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  • Local characterization of superconductivity in BaFe2(As1-xPx)(2) Reviewed

    Y. Lamhot, A. Yagil, N. Shapira, S. Kasahara, T. Watashige, T. Shibauchi, Y. Matsuda, O. M. Auslaender

    PHYSICAL REVIEW B   91 ( 6 )   2015.2

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  • Structural Origin of the Anomalous Temperature Dependence of the Local Magnetic Moments in the CaFe2As2 Family of Materials Reviewed

    L. Ortenzi, H. Gretarsson, S. Kasahara, Y. Matsuda, T. Shibauchi, K. D. Finkelstein, W. Wu, S. R. Julian, Young-June Kim, I. I. Mazin, L. Boeri

    PHYSICAL REVIEW LETTERS   114 ( 4 )   1 - 47001   2015.1

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    DOI: 10.1103/PhysRevLett.114.047001

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  • 21aBA-5 Critical Current Density and Flux Pinning Mechanism of FeSe Single Crystal

    Sun Y., Pyon S., Tamegai T., Kobayashi R., Watashige T., Kasahara S., Matsuda Y., Shibauchi T., Kitamura H.

    Meeting Abstracts of the Physical Society of Japan   70   1938 - 1938   2015

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    DOI: 10.11316/jpsgaiyo.70.1.0_1938

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  • Evidence for Time-Reversal Symmetry Breaking of the Superconducting State near Twin-Boundary Interfaces in FeSe Revealed by Scanning Tunneling Spectroscopy

    Watashige, T., Tsutsumi, Y., Hanaguri, T., Kohsaka, Y., Kasahara, S., Furusaki, A., Sigrist, M., Meingast, C., Wolf, T., v Loehneysen, H., Shibauchi, T., Matsuda, Y.

    Physical Review X   5 ( 3 )   2015

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    DOI: 10.1103/PhysRevX.5.031022

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  • Anomalous critical fields in quantum critical superconductors Reviewed

    C. Putzke, P. Walmsley, J. D. Fletcher, L. Malone, D. Vignolles, C. Proust, S. Badoux, P. See, H. E. Beere, D. A. Ritchie, S. Kasahara, Y. Mizukami, T. Shibauchi, Y. Matsuda, A. Carrington

    NATURE COMMUNICATIONS   5   2014.12

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    DOI: 10.1038/ncomms6679

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  • Anisotropy of the superconducting gap in the iron-based superconductor BaFe2(As1-xPx)(2) Reviewed

    T. Yoshida, S. Ideta, T. Shimojima, W. Malaeb, K. Shinada, H. Suzuki, I. Nishi, A. Fujimori, K. Ishizaka, S. Shin, Y. Nakashima, H. Anzai, M. Arita, A. Ino, H. Namatame, M. Taniguchi, H. Kumigashira, K. Ono, S. Kasahara, T. Shibauchi, T. Terashima, Y. Matsuda, M. Nakajima, S. Uchida, Y. Tomioka, T. Ito, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, H. Ikeda, R. Arita, T. Saito, S. Onari, H. Kontani

    SCIENTIFIC REPORTS   4   7292   2014.12

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  • Disorder-induced topological change of the superconducting gap structure in iron pnictides Reviewed

    Y. Mizukami, M. Konczykowski, Y. Kawamoto, S. Kurata, S. Kasahara, K. Hashimoto, V. Mishra, A. Kreisel, Y. Wang, P. J. Hirschfeld, Y. Matsuda, T. Shibauchi

    NATURE COMMUNICATIONS   5   5657   2014.11

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    DOI: 10.1038/ncomms6657

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  • Anomalous Fermi surface in FeSe seen by Shubnikov-de Haas oscillation measurements Reviewed

    Taichi Terashima, Naoki Kikugawa, Andhika Kiswandhi, Eun-Sang Choi, James S. Brooks, Shigeru Kasahara, Tatsuya Watashige, Hiroaki Ikeda, Takasada Shibauchi, Yuji Matsuda, Thomas Wolf, Anna E. Boehmer, Frederic Hardy, Christoph Meingast, Hilbert von Loehneysen, Michi-To Suzuki, Ryotaro Arita, Shinya Uji

    PHYSICAL REVIEW B   90 ( 14 )   1 - 144517   2014.10

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    DOI: 10.1103/PhysRevB.90.144517

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  • Superconducting gap structure of BaFe_2(As_{1-x}P_{x})_2

    L. Malone, Y. Mizukami, P. Walmsley, C. Putzke, S. Kasahara, T. Shibauchi, Y. Matsuda, A. Carrington

    2014.9

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    We present a study of the superconducting gap structure in the iron-pnictide<br />
    series BaFe2(As1-xPx)2. By measuring the variation of the specific heat as a<br />
    function of temperature and magnetic field we are able to determine the number<br />
    and Fermi surface location of the nodes in the superconducting gap. In<br />
    particular, from measurements of the variation of the specific heat as the<br />
    magnetic field is rotated in the ab plane of the sample we conclude that the<br />
    nodes are in the [110] directions. Then from a quantitative analysis of the<br />
    temperature and field dependence of the specific heat we further conclude that<br />
    nodes exists on all Fermi surface sheets.

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  • Infrared pseudogap in cuprate and pnictide high-temperature superconductors Reviewed

    S. J. Moon, Y. S. Lee, A. A. Schafgans, A. V. Chubukov, S. Kasahara, T. Shibauchi, T. Terashima, Y. Matsuda, M. A. Tanatar, R. Prozorov, A. Thaler, P. C. Canfield, S. L. Bud'ko, A. S. Sefat, D. Mandrus, K. Segawa, Y. Ando, D. N. Basov

    PHYSICAL REVIEW B   90 ( 1 )   2014.7

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    DOI: 10.1103/PhysRevB.90.014503

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  • Direct observation of lattice symmetry breaking at the hidden-order transition in URu2Si2 Reviewed

    S. Tonegawa, S. Kasahara, T. Fukuda, K. Sugimoto, N. Yasuda, Y. Tsuruhara, D. Watanabe, Y. Mizukami, Y. Haga, T. D. Matsuda, E. Yamamoto, Y. Onuki, H. Ikeda, Y. Matsuda, T. Shibauchi

    NATURE COMMUNICATIONS   5   4188   2014.6

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  • Doping evolution of the quasiparticle excitations in heavily hole-doped Ba 1 - X K x Fe 2 As 2: A possible superconducting gap with sign-reversal between hole pockets Reviewed

    D. Watanabe, T. Yamashita, Y. Kawamoto, S. Kurata, Y. Mizukami, T. Ohta, S. Kasahara, M. Yamashita, T. Saito, H. Fukazawa, Y. Kohori, S. Ishida, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, A. B. Vorontsov, T. Shibauchi, Y. Matsuda

    Physical Review B - Condensed Matter and Materials Physics   89 ( 11 )   2014.3

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    DOI: 10.1103/PhysRevB.89.115112

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  • Doping evolution of the quasiparticle excitations in heavily hole-doped Ba1-xKxFe2As2: A possible superconducting gap with sign-reversal between hole pockets Reviewed

    D. Watanabe, T. Yamashita, Y. Kawamoto, S. Kurata, Y. Mizukami, T. Ohta, S. Kasahara, M. Yamashita, T. Saito, H. Fukazawa, Y. Kohori, S. Ishida, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, A. B. Vorontsov, T. Shibauchi, Y. Matsuda

    PHYSICAL REVIEW B   89 ( 11 )   2014.3

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    DOI: 10.1103/PhysRevB.89.115112

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  • Pseudogap formation above the superconducting dome in iron pnictides Reviewed

    T. Shimojima, T. Sonobe, W. Malaeb, K. Shinada, A. Chainani, S. Shin, T. Yoshida, S. Ideta, A. Fujimori, H. Kumigashira, K. Ono, Y. Nakashima, H. Anzai, M. Arita, A. Ino, H. Namatame, M. Taniguchi, M. Nakajima, S. Uchida, Y. Tomioka, T. Ito, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, K. Ohgushi, S. Kasahara, T. Terashima, H. Ikeda, T. Shibauchi, Y. Matsuda, K. Ishizaka

    PHYSICAL REVIEW B   89 ( 4 )   2014.1

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    DOI: 10.1103/PhysRevB.89.045101

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  • Field-induced superconducting phase of FeSe in the BCS-BEC cross-over Reviewed

    Kasahara, Shigeru, Watashige, Tatsuya, Hanaguri, Tetsuo, Kohsaka, Yuhki, Yamashita, Takuya, Shimoyama, Yusuke, Mizukami, Yuta, Endo, Ryota, Ikeda, Hiroaki, Aoyama, Kazushi, Terashima, Taichi, Uji, Shinya, Wolf, Thomas, von Loehneysen, Hilbert, Shibauchi, Takasada, Matsuda, Yuji

    Proceedings of the National Academy of Sciences of the United States of America   111 ( 46 )   16309 - 16313   2014

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    DOI: 10.1073/pnas.1413477111

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  • Quasiparticle Mass Enhancement Close to the Quantum Critical Point in BaFe2(As1-xPx)(2) Reviewed

    P. Walmsley, C. Putzke, L. Malone, I. Guillamon, D. Vignolles, C. Proust, S. Badoux, A. I. Coldea, M. D. Watson, S. Kasahara, Y. Mizukami, T. Shibauchi, Y. Matsuda, A. Carrington

    PHYSICAL REVIEW LETTERS   110 ( 25 )   257002 - 257002   2013.6

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    DOI: 10.1103/PhysRevLett.110.257002

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  • Normal-state spin dynamics in the iron-pnictide superconductors BaFe2(As1-xPx)(2) and Ba(Fe1-xCox)(2)As-2 probed with NMR measurements Reviewed

    Y. Nakai, T. Iye, S. Kitagawa, K. Ishida, S. Kasahara, T. Shibauchi, Y. Matsuda, H. Ikeda, T. Terashima

    PHYSICAL REVIEW B   87 ( 17 )   2013.5

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    DOI: 10.1103/PhysRevB.87.174507

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  • Disorder, critical currents, and vortex pinning energies in isovalently substituted BaFe2(As1-xPx)2 Reviewed

    S. Demirdiş, Y. Fasano, S. Kasahara, T. Terashima, T. Shibauchi, Y. Matsuda, Marcin Konczykowski, H. Pastoriza, C. J. Van Der Beek

    Physical Review B - Condensed Matter and Materials Physics   87 ( 9 )   2013.3

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    DOI: 10.1103/PhysRevB.87.094506

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  • Interplane resistivity of isovalent doped BaFe2(As 1-xPx)2 Reviewed

    M. A. Tanatar, K. Hashimoto, S. Kasahara, T. Shibauchi, Y. Matsuda, R. Prozorov

    Physical Review B - Condensed Matter and Materials Physics   87 ( 10 )   2013.3

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    DOI: 10.1103/PhysRevB.87.104506

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  • Interplane resistivity of isovalent doped BaFe2(As1-xPx)(2) Reviewed

    M. A. Tanatar, K. Hashimoto, S. Kasahara, T. Shibauchi, Y. Matsuda, R. Prozorov

    PHYSICAL REVIEW B   87 ( 10 )   2013.3

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  • Disorder, critical currents, and vortex pinning energies in isovalently substituted BaFe2(As1-xPx)(2) Reviewed

    S. Demirdis, Y. Fasano, S. Kasahara, T. Terashima, T. Shibauchi, Y. Matsuda, Marcin Konczykowski, H. Pastoriza, C. J. van der Beek

    PHYSICAL REVIEW B   87 ( 9 )   2013.3

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  • Importance of both spin and orbital fluctuations in BaFe2(As1-xPx)2 : Evidence from superconducting gap anisotropy Reviewed

    T. Yoshida, S. Ideta, T. Shimojima, W. Malaeb, K. Shinada, H. Suzuki, I. Nishi, A. Fujimori, K. Ishizaka, S. Shin, Y. Nakashima, H. Anzai, M. Arita, A. Ino, H. Namatame, M. Taniguchi, H. Kumigashira, K. Ono, S. Kasahara, T. Shibauchi, T. Terashima, Y. Matsuda, M. Nakajima, S. Uchida, Y. Tomioka, T. Ito, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, H. Ikeda, R. Arita, T. Saito, S. Onari, H. Kontani

    Sci. Rep. 4, 7292 (2014)   2013.1

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    In the iron pnictide superconductors, two distinct unconventional mechanisms<br />
    of superconductivity have been put forth: One is mediated by spin fluctuations<br />
    leading to the s+- state with sign change of superconducting gap between the<br />
    hole and electron bands, and the other is orbital fluctuations which favor the<br />
    s++ state without sign reversal. Here we report direct observation of peculiar<br />
    momentum-dependent anisotropy in the superconducting gap from angle-resolved<br />
    photoemission spectroscopy (ARPES) in BaFe2(As1-xPx)2 (Tc=30 K). The large<br />
    anisotropy found only in the electron Fermi surface (FS) and the nearly<br />
    isotropic gap on the entire hole FSs are together consistent with modified s+-<br />
    gap with nodal loops, which can be theoretically reproduced by considering both<br />
    spin and orbital fluctuations whose competition generates the gap modulation.<br />
    This indicates that these two fluctuations are nearly equally important to the<br />
    high-Tc superconductivity in this system.

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  • Thermodynamic phase diagram, phase competition, and uniaxial pressure effects in BaFe2(As1-xPx)(2) studied by thermal expansion Reviewed

    A. E. Boehmer, P. Burger, F. Hardy, T. Wolf, P. Schweiss, R. Fromknecht, H. von Loehneysen, C. Meingast, H. K. Mak, R. Lortz, S. Kasahara, T. Terashima, T. Shibauchi, Y. Matsuda

    PHYSICAL REVIEW B   86 ( 9 )   2012.9

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    DOI: 10.1103/PhysRevB.86.094521

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  • Infrared Measurement of the Pseudogap of P-Doped and Co-Doped High-Temperature BaFe2As2 Superconductors Reviewed

    S. J. Moon, A. A. Schafgans, S. Kasahara, T. Shibauchi, T. Terashima, Y. Matsuda, M. A. Tanatar, R. Prozorov, A. Thaler, P. C. Canfield, A. S. Sefat, D. Mandrus, D. N. Basov

    PHYSICAL REVIEW LETTERS   109 ( 2 )   2012.7

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    DOI: 10.1103/PhysRevLett.109.027006

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  • Electronic nematicity above the structural and superconducting transition in BaFe2(As1-xPx)(2) Reviewed

    S. Kasahara, H. J. Shi, K. Hashimoto, S. Tonegawa, Y. Mizukami, T. Shibauchi, K. Sugimoto, T. Fukuda, T. Terashima, Andriy H. Nevidomskyy, Y. Matsuda

    NATURE   486 ( 7403 )   382 - 385   2012.6

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    DOI: 10.1038/nature11178

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  • A Sharp Peak of the Zero-Temperature Penetration Depth at Optimal Composition in BaFe2(As1-xPx)(2) Reviewed

    K. Hashimoto, K. Cho, T. Shibauchi, S. Kasahara, Y. Mizukami, R. Katsumata, Y. Tsuruhara, T. Terashima, H. Ikeda, M. A. Tanatar, H. Kitano, N. Salovich, R. W. Giannetta, P. Walmsley, A. Carrington, R. Prozorov, Y. Matsuda

    SCIENCE   336 ( 6088 )   1554 - 1557   2012.6

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    DOI: 10.1126/science.1219821

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  • Gradual suppression of antiferromagnetism in BaFe2(As1-xPx)(2): Zero-temperature evidence for a quantum critical point Reviewed

    Tetsuya Iye, Yusuke Nakai, Shunsaku Kitagawa, Kenji Ishida, Shigeru Kasahara, Takasada Shibauchi, Yuji Matsuda, Takahito Terashima

    PHYSICAL REVIEW B   85 ( 18 )   2012.5

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    DOI: 10.1103/PhysRevB.85.184505

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  • Epitaxial Thin Films of ATiO(3-x)H(x) (A = Ba, Sr, Ca) with Metallic Conductivity Reviewed

    Takeshi Yajima, Atsushi Kitada, Yoji Kobayashi, Tatsunori Sakaguchi, Guillaume. Bouilly, Shigeru Kasahara, Takahito Terashima, Mikio Takano, Hiroshi Kageyama

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   134 ( 21 )   8782 - 8785   2012.5

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    DOI: 10.1021/ja302465c

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  • Angle-resolved photoemission study on the superconducting iron-pnictides of BaFe2(As, P)(2) with low energy photons Reviewed

    T. Shimojima, F. Sakaguchi, K. Ishizaka, Y. Ishida, W. Malaeb, T. Yoshida, S. Ideta, A. Fujimori, T. Kiss, M. Okawa, T. Togashi, C. -T. Chen, S. Watanabe, Y. Nakashima, A. Ino, H. Anzai, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, S. Kasahara, T. Terashima, T. Shibauchi, Y. Matsuda, M. Nakajima, S. Uchida, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, A. Chainani, S. Shin

    SOLID STATE COMMUNICATIONS   152 ( 8 )   695 - 700   2012.4

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    DOI: 10.1016/j.ssc.2011.12.032

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  • Microscopic Evidence of Direct Coupling between Magnetic and Superconducting Order Parameters in BaFe2(As1-xPx)(2) Reviewed

    Tetsuya Iye, Yusuke Nakai, Shunsaku Kitagawa, Kenji Ishida, Shigeru Kasahara, Takasada Shibauchi, Yuji Matsuda, Takahito Terashima

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   81 ( 3 )   2012.3

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    DOI: 10.1143/JPSJ.81.033701

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  • Contrasts in electron correlations and inelastic scattering between LiFeP and LiFeAs revealed by charge transport Reviewed

    S. Kasahara, K. Hashimoto, H. Ikeda, T. Terashima, Y. Matsuda, T. Shibauchi

    Physical Review B - Condensed Matter and Materials Physics   85 ( 6 )   2012.2

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    DOI: 10.1103/PhysRevB.85.060503

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  • Contrasts in electron correlations and inelastic scattering between LiFeP and LiFeAs revealed by charge transport Reviewed

    S. Kasahara, K. Hashimoto, H. Ikeda, T. Terashima, Y. Matsuda, T. Shibauchi

    PHYSICAL REVIEW B   85 ( 6 )   2012.2

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    DOI: 10.1103/PhysRevB.85.060503

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  • de Haas-van Alphen Study of the Fermi Surfaces of Superconducting LiFeP and LiFeAs Reviewed

    C. Putzke, A. I. Coldea, I. Guillamon, D. Vignolles, A. McCollam, D. LeBoeuf, M. D. Watson, I. I. Mazin, S. Kasahara, T. Terashima, T. Shibauchi, Y. Matsuda, A. Carrington

    PHYSICAL REVIEW LETTERS   108 ( 4 )   1 - 47002   2012.1

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    DOI: 10.1103/PhysRevLett.108.047002

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  • Nodal versus Nodeless Behaviors of the Order Parameters of LiFeP and LiFeAs Superconductors from Magnetic Penetration-Depth Measurements Reviewed

    K. Hashimoto, S. Kasahara, R. Katsumata, Y. Mizukami, M. Yamashita, H. Ikeda, T. Terashima, A. Carrington, Y. Matsuda, T. Shibauchi

    PHYSICAL REVIEW LETTERS   108 ( 4 )   047003 - 47003   2012.1

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    DOI: 10.1103/PhysRevLett.108.047003

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  • Volovik effect in a highly anisotropic multiband superconductor: Experiment and theory Reviewed

    Y. Wang, J. S. Kim, G. R. Stewart, P. J. Hirschfeld, S. Graser, S. Kasahara, T. Terashima, Y. Matsuda, T. Shibauchi, I. Vekhter

    PHYSICAL REVIEW B   84 ( 18 )   2011.11

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    DOI: 10.1103/PhysRevB.84.184524

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  • Nodal gap structure of superconducting BaFe2(As1-xPx)(2) from angle-resolved thermal conductivity in a magnetic field Reviewed

    M. Yamashita, Y. Senshu, T. Shibauchi, S. Kasahara, K. Hashimoto, D. Watanabe, H. Ikeda, T. Terashima, I. Vekhter, A. B. Vorontsov, Y. Matsuda

    PHYSICAL REVIEW B   84 ( 6 )   2011.8

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  • Specific heat discontinuity, Delta C, at T-c in BaFe2(As0.7P0.3)(2)-consistent with unconventional superconductivity Reviewed

    J. S. Kim, G. R. Stewart, S. Kasahara, T. Shibauchi, T. Terashima, Y. Matsuda

    JOURNAL OF PHYSICS-CONDENSED MATTER   23 ( 22 )   222201 - 5   2011.6

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    DOI: 10.1088/0953-8984/23/22/222201

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  • Nesting of electron and hole Fermi surfaces in nonsuperconducting BaFe2P2 Reviewed

    B. J. Arnold, S. Kasahara, A. I. Coldea, T. Terashima, Y. Matsuda, T. Shibauchi, A. Carrington

    PHYSICAL REVIEW B   83 ( 22 )   2011.6

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    DOI: 10.1103/PhysRevB.83.220504

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  • Orbital-Independent Superconducting Gaps in Iron Pnictides Reviewed

    T. Shimojima, F. Sakaguchi, K. Ishizaka, Y. Ishida, T. Kiss, M. Okawa, T. Togashi, C. -T. Chen, S. Watanabe, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, K. Ohgushi, S. Kasahara, T. Terashima, T. Shibauchi, Y. Matsuda, A. Chainani, S. Shin

    SCIENCE   332 ( 6029 )   564 - 567   2011.4

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    DOI: 10.1126/science.1202150

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  • Highly Reduced Anatase TiO2-delta Thin Films Obtained via Low-Temperature Reduction Reviewed

    Atsushi Kitada, Shigeru Kasahara, Takahito Terashima, Kazuyoshi Yoshimura, Yoji Kobayashi, Hiroshi Kageyama

    APPLIED PHYSICS EXPRESS   4 ( 3 )   1 - 35801   2011.3

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    DOI: 10.1143/APEX.4.035801

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  • Two-Dimensional and Three-Dimensional Fermi Surfaces of Superconducting BaFe2(As1-xPx)(2) and Their Nesting Properties Revealed by Angle-Resolved Photoemission Spectroscopy Reviewed

    T. Yoshida, I. Nishi, S. Ideta, A. Fujimori, M. Kubota, K. Ono, S. Kasahara, T. Shibauchi, T. Terashima, Y. Matsuda, H. Ikeda, R. Arita

    PHYSICAL REVIEW LETTERS   106 ( 11 )   117001 - 117001   2011.3

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  • Abrupt recovery of Fermi-liquid transport following the collapse of the c axis in CaFe2(As1-xPx)(2) single crystals Reviewed

    S. Kasahara, T. Shibauchi, K. Hashimoto, Y. Nakai, H. Ikeda, T. Terashima, Y. Matsuda

    PHYSICAL REVIEW B   83 ( 6 )   2011.2

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  • Non-fermi liquid charge transport properties and quantum critical point behaviors as seen in BaFe2(As1-xPx)2 iron-pnictide superconductor

    笠原 成

    京都大学低温物質科学研究センター誌   ( 17 )   10 - 18   2010.12

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    Non-Fermi liquid like charge transport properties and quantum critical behaviors observed in high-quality single crystals of BaFe[2](As[1-x]Px)[2] are reviewed. Near the SDW end point, charge transport coefficients, including resistivity, Hall coefficient and magnetoresistance, exhibit striking deviations from the conventional Fermi liquid properties. De Haas-van Alphen effect measurements in a wide range of superconducting dome reveal that thevolume of the Fermi surfaces shrink and the effective masses are enhanced as x approaches the critical concentration with highest Tc. It is also shown that antiferromagnetic fluctuations deduced from [31]P-NMR measurements are notably enhanced near this optimal composition, where magnetically ordered temperature θ deduced from relaxation rate is found to vanish. It is likely that these trends originate from the many-body interaction which gives rise to high-temperature superconductivity in iron-pnictides.

    DOI: 10.14989/153265

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  • Chemical Pressure and Physical Pressure in BaFe2(As1-xPx)(2) Reviewed

    Lina E. Klintberg, Swee K. Goh, Shigeru Kasahara, Yusuke Nakai, Kenji Ishida, Michael Sutherland, Takasada Shibauchi, Yuji Matsuda, Takahito Terashima

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   79 ( 12 )   1 - 123706   2010.12

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    DOI: 10.1143/JPSJ.79.123706

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  • Quasiparticle Scattering Induced by Charge Doping of Iron-Pnictide Superconductors Probed by Collective Vortex Pinning Reviewed

    Cornelis J. van der Beek, Marcin Konczykowski, Shigeru Kasahara, Takahito Terashima, Ryuji Okazaki, Takasada Shibauchi, Yuji Matsuda

    PHYSICAL REVIEW LETTERS   105 ( 26 )   1 - 267002   2010.12

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  • Superconductivity induced by isovalent doping in single crystals of BaFe2(As1-xPx)(2) Reviewed

    S. Kasahara, K. Hashimoto, R. Okazaki, H. Shishido, M. Yamashita, K. Ikada, S. Tonegawa, N. Nakata, Y. Sensyu, H. Takeya, K. Hirata, T. Shibauchi, T. Terashima, Y. Matsuda

    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   470 ( SUPPL.1 )   S462 - S463   2010.12

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    DOI: 10.1016/j.physc.2009.10.137

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  • Characterization of FeSe single crystals Reviewed

    Hiroyuki Takeya, Shigeru Kasahara, Kazuto Hirata, Takashi Mochiku, Akira Sato, Yoshihiko Takano

    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   470   S497 - S498   2010.12

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    DOI: 10.1016/j.physc.2009.10.041

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  • Antiferromagnetic fluctuations in iron pnictide superconductor BaFe2(As0.67P0.33)(2) investigated by P-31 NMR Reviewed

    Yusuke Nakai, Tetsuya Iye, Shunsaku Kitagawa, Kenji Ishida, Shigeru Kasahara, Takasada Shibauchi, Yuji Matsuda, Takahito Terashima

    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   470   S420 - S421   2010.12

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    DOI: 10.1016/j.physc.2010.01.047

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  • Unconventional Superconductivity and Antiferromagnetic Quantum Critical Behavior in the Isovalent-Doped BaFe2(As1-xPx)(2) Reviewed

    Y. Nakai, T. Iye, S. Kitagawa, K. Ishida, H. Ikeda, S. Kasahara, H. Shishido, T. Shibauchi, Y. Matsuda, T. Terashima

    PHYSICAL REVIEW LETTERS   105 ( 10 )   107003 - 107003   2010.9

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  • Anisotropic superconducting properties of optimally doped BaFe2(As0.65P0.35)(2) under pressure Reviewed

    Swee K. Goh, Y. Nakai, K. Ishida, L. E. Klintberg, Y. Ihara, S. Kasahara, T. Shibauchi, Y. Matsuda, T. Terashima

    PHYSICAL REVIEW B   82 ( 9 )   2010.9

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    DOI: 10.1103/PhysRevB.82.094502

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  • Specific heat versus field in the 30 K superconductor BaFe2(As0.7P0.3)(2) Reviewed

    J. S. Kim, P. J. Hirschfeld, G. R. Stewart, S. Kasahara, T. Shibauchi, T. Terashima, Y. Matsuda

    PHYSICAL REVIEW B   81 ( 21 )   2010.6

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    DOI: 10.1103/PhysRevB.81.214507

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  • Line nodes in the energy gap of superconducting BaFe2(As1-xPx)(2) single crystals as seen via penetration depth and thermal conductivity Reviewed

    K. Hashimoto, M. Yamashita, S. Kasahara, Y. Senshu, N. Nakata, S. Tonegawa, K. Ikada, A. Serafin, A. Carrington, T. Terashima, H. Ikeda, T. Shibauchi, Y. Matsuda

    PHYSICAL REVIEW B   81 ( 22 )   2010.6

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    DOI: 10.1103/PhysRevB.81.220501

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  • Evolution from non-Fermi- to Fermi-liquid transport via isovalent doping in BaFe2(As(1-x)Px)(2) superconductors Reviewed

    S. Kasahara, T. Shibauchi, K. Hashimoto, K. Ikada, S. Tonegawa, R. Okazaki, H. Shishido, H. Ikeda, H. Takeya, K. Hirata, T. Terashima, Y. Matsuda

    PHYSICAL REVIEW B   81 ( 18 )   2010.5

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    DOI: 10.1103/PhysRevB.81.184519

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  • Evolution of the Fermi Surface of BaFe2(As1-xPx)(2) on Entering the Superconducting Dome Reviewed

    H. Shishido, A. F. Bangura, A. I. Coldea, S. Tonegawa, K. Hashimoto, S. Kasahara, P. M. C. Rourke, H. Ikeda, T. Terashima, R. Settai, Y. Onuki, D. Vignolles, C. Proust, B. Vignolle, A. McCollam, Y. Matsuda, T. Shibauchi, A. Carrington

    PHYSICAL REVIEW LETTERS   104 ( 5 )   057008 - 57008   2010.2

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    DOI: 10.1103/PhysRevLett.104.057008

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  • P 31 and A 75 s NMR evidence for a residual density of states at zero energy in superconducting BaFe<inf>2</inf>( As<inf>0.67</inf>P <inf>0.33</inf>)<inf>2</inf> Reviewed

    Nakai, Y., Iye, T., Kitagawa, S., Ishida, K., Kasahara, S., Shibauchi, T., Matsuda, Y., Terashima, T.

    Physical Review B - Condensed Matter and Materials Physics   81 ( 2 )   020503(R)-1 - 020503(R)-4   2010.1

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    DOI: 10.1103/PhysRevB.81.020503

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  • P-31 and As-75 NMR evidence for a residual density of states at zero energy in superconducting BaFe2(As0.67P0.33)(2) Reviewed

    Yusuke Nakai, Tetsuya Iye, Shunsaku Kitagawa, Kenji Ishida, Shigeru Kasahara, Takasada Shibauchi, Yuji Matsuda, Takahito Terashima

    PHYSICAL REVIEW B   81 ( 2 )   1 - 20503   2010.1

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    DOI: 10.1103/PhysRevB.81.020503

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  • Crystal Growth and Characterization of FeAs-based Superconductors Reviewed

    Hiroyuki Takeya, Shigeru Kasahara, Kazuto Hirata

    THERMEC 2009, PTS 1-4   638-642 ( Pt.2 )   1412 - +   2010

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    DOI: 10.4028/www.scientific.net/MSF.638-642.1412

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  • Rotationally resolved high-resolution spectrum of the S-1-S-0 transition of jet-cooled thioanisole Reviewed

    Hoshino-Nagasaka, Mariko, Suzuki, Tadashi, Ichimura, Teijiro, Kasahara, Shunji, Baba, Masaaki, Kawauchi, Susumu

    Physical Chemistry Chemical Physics   12 ( 40 )   2010

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    DOI: 10.1039/c004454g

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  • Microwave Surface-Impedance Measurements of the Magnetic Penetration Depth in Single Crystal Ba1-xKxFe2As2 Superconductors: Evidence for a Disorder-Dependent Superfluid Density Reviewed

    K. Hashimoto, T. Shibauchi, S. Kasahara, K. Ikada, S. Tonegawa, T. Kato, R. Okazaki, C. J. van der Beek, M. Konczykowski, H. Takeya, K. Hirata, T. Terashima, Y. Matsuda

    PHYSICAL REVIEW LETTERS   102 ( 20 )   207001 - 207001   2009.5

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  • Specific heat of novel ternary superconductors La3Ni4X4 (X = Si and Ge) Reviewed

    S. Kasahara, H. Fujii, T. Mochiku, H. Takeya, K. Hirata

    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   468 ( 15-20 )   1231 - 1233   2008.9

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  • Low temperature specific heat of superconducting ternary intermetallics La(3)Pd(4)Ge(4), La(3)Ni(4)Si(4), and La(3)Ni(4)Ge(4) with U(3)Ni(4)Si(4)-type structure Reviewed

    S. Kasahara, H. Fujii, H. Takeya, T. Mochiku, A. D. Thakur, K. Hirata

    JOURNAL OF PHYSICS-CONDENSED MATTER   20 ( 38 )   2008.9

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    DOI: 10.1088/0953-8984/20/38/385204

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  • Specific heat of Li-2(Pd(1-x)pt(x))(3)B superconductors [x=0, 0.5, and 1] Reviewed

    Hiroyuki Takeya, Shigeru Kasahara, Mohammed El Massalami, Takashi Mochikua, Kazuto Hirata, Kazumasa Togano

    PHYSICA B-CONDENSED MATTER   403 ( 5-9 )   1078 - 1080   2008.4

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    DOI: 10.1016/j.physb.2007.10.249

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  • Low temperature specific heat of ternary germanide superconductor La3Pd4Ge4 Reviewed

    Shigeru Kasahara, Hiroki Fujil, Takashi Mochiku, Hiroyuki Takeya, Kazuto Hirata

    PHYSICA B-CONDENSED MATTER   403 ( 5-9 )   1119 - 1121   2008.4

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    DOI: 10.1016/j.physb.2007.10.347

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  • Superconductivity in the ternary intermetallics of La(3)Ni(4)X(4) (X = Si and Ge) Reviewed

    H. Fujii, S. Kasahara

    JOURNAL OF PHYSICS-CONDENSED MATTER   20 ( 7 )   2008.2

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    DOI: 10.1088/0953-8984/20/7/075202

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  • Superconducting Double Transition in PrOs4Sb12 Probed by Local Magnetization Measurements and Magneto-Optical Imaging Reviewed

    Shigeru Kasahara, Kazuto Hirata, Hiroyuki Takeya, Tsuyoshi Tamegai, Hitoshi Sugawara, Daisuke Kikuchi, Hideyuki Sato

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   77   327 - 329   2008.1

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    DOI: 10.1143/JPSJS.77SA.327

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  • Specific heat of lithium ternary borides under magnetic field Reviewed

    Hiroyuki Takeya, Shigeru Kasahara, Mohammed El Massalami, Kazuto Hirata, Kazumasa Togano

    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   463   111 - 114   2007.10

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    DOI: 10.1016/j.physc.2007.05.015

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  • Positive local magnetization in the superconducting state of PrOs4Sb12 Reviewed

    Shigeru Kasahara, Kazuto Hirata, Tsuyoshi Tamegai, Hitoshi Sugawara, Daisuke Kikuchi, Hideyuki Sato

    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   463   71 - 75   2007.10

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    DOI: 10.1016/j.physc.2007.05.004

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  • Double transition in PrOs4Sb12 probed by local magnetization measurements using Hall probe array Reviewed

    Shigeru Kasahara, Kazuto Hirata, Tsuyoshi Tamegai, Hitoshi Sugawara, Daisuke Kikuchi, Hideyuki Sato

    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   460   696 - 697   2007.9

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    DOI: 10.1016/j.physc.2007.03.134

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  • Specific-heat studies of the spin-orbit interaction in noncentrosymmetric Li-2(Pd1-xPtx)(3)B (x=0,0.5,1) superconductors Reviewed

    H. Takeya, M. ElMassalami, S. Kasahara, K. Hirata

    PHYSICAL REVIEW B   76 ( 10 )   2007.9

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    DOI: 10.1103/PhysRevB.76.104506

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  • Pressure effect and superconducting properties of lithium ternary borides Reviewed

    Hiroyuki Takeya, Mohammed El Massalami, Kazuto Hirata, Takashi Mochiku, Shigeru Kasahara, Kazumasa Togano

    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   460   89 - 90   2007.9

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    DOI: 10.1016/j.physc.2007.03.162

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  • Comparison of CDR3 length among thymocyte subpopulations: Impacts of MHC and BV segment on the CDR3 shortening Reviewed

    Matsutani Takaji, Ohmori Takehiko, Ogata Masaki, Soga Hiroyuki, Kasahara Shigeru, Yoshioka Takeshi, Suzuki Ryuji, Itoh Tsunetoshi

    MOLECULAR IMMUNOLOGY   44 ( 9 )   2378 - 2387   2007.3

  • Physical properties of Li2Pd3B and Li2Pt3B superconductors Reviewed

    Hiroyuki Takeya, Shigeru Kasahara, Mohammed El Massalami, Takashi Mochiku, Kazuto Hirata, Kazumasa Togano

    PRICM 6: SIXTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-3   561-565   2079 - +   2007

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  • Physical properties of Li <inf>2</inf> Pd <inf>3</inf> B and Li <inf>2</inf> Pt <inf>3</inf> B superconductors

    Takeya, H., Kasahara, S., El Massalami, M., Mochiku, T., Hirata, K., Togano, K.

    Materials Science Forum   561-565 ( PART 3 )   2007

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  • Local field measurements in PrOs4Sb12 with broken time-reversal symmetry Reviewed

    Shigeru Kasahara, Tsuyoshi Tamegai, Hitoshi Sugawara, Hideyuki Sato

    LOW TEMPERATURE PHYSICS, PTS A AND B   850   651 - +   2006

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    DOI: 10.1063/1.2354878

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  • Comparative study of anisotropic superconductivity in CaAlSi and CaGaSi Reviewed

    T Tamegai, K Uozato, S Kasahara, T Nakagawa, M Tokunaga

    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   426 ( I )   208 - 212   2005.10

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    DOI: 10.1016/j.physc.2005.01.020

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  • Peculiar superconductivity in PrOs4Sb12 probed by local magnetization Reviewed

    S Kasahara, T Tamegai, H Sugawara, H Sato

    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   426 ( I )   381 - 385   2005.10

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    DOI: 10.1016/j.physc.2005.02.050

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  • Local magnetization anomalies and inhomogeneous vortex penetration in the crossing-lattices state of Bi2Sr2CaCu2O8+y Reviewed

    S. Kasahara, Y. Tokunaga, N. Kameda, M. Tokunaga, T. Tamegai

    Physical Review B - Condensed Matter and Materials Physics   71 ( 22 )   2005.6

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    DOI: 10.1103/PhysRevB.71.224505

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  • Local magnetization anomalies and inhomogeneous vortex penetration in the crossing-lattices state of Bi2Sr2CaCu2O8+y Reviewed

    S Kasahara, Y Tokunaga, N Kameda, M Tokunaga, T Tamegai

    PHYSICAL REVIEW B   71 ( 22 )   2005.6

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  • Doping dependence of crossing vortex lattice in Bi2Sr2CaCu2O8+y Reviewed

    S Kasahara, N Kameda, M Tokunaga, T Tamegai

    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   412 ( SPEC. ISS. )   440 - 443   2004.10

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    DOI: 10.1016/j.physc.2004.01.067

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  • Pinning anomalies in organic layered superconductor kappa-(BEDT-TTF)(2)X {X = Cu(NCS)(2), Cu[N(CN)(2)]Br} Reviewed

    S Kasahara, F Tateishi, H Caneko, T Hara, Y Nishio, K Kajita

    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   388   607 - 608   2003.5

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    DOI: 10.1016/S0921-4534(02)02763-6

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  • Resistance oscillation and dynamical instabilities of vortices in kappa-(BEDT-TTF)(2)Cu(NCS)(2) Reviewed

    S Kasahara, F Tateishi, H Caneko, T Hara, Y Nishio, K Kajita

    SYNTHETIC METALS   137 ( 1-3 )   1283 - 1284   2003.4

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    DOI: 10.1016/S0379-6779(02)01141-4

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  • Dynamical behavior of vortices introduced into a layered superconductor κ-(BEDT-TTF)2Cu(NCS)2 Reviewed

    Shigeru Kasahara, Yutaka Nishio, Koji Kajita

    Synthetic Metals   120 ( 1-3 )   937 - 938   2001.3

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    DOI: 10.1016/S0379-6779(00)01155-3

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  • Vortex motion in an organic superconductor κ-(BEDT-TTF)2Cu(SCN)2 Reviewed

    T. Ichikawa, S. Kasahara, M. Tamura, Y. Nishio, K. Kajita

    Synthetic Metals   103 ( 1-3 )   1822 - 1823   1999.6

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    DOI: 10.1016/S0379-6779(98)00471-8

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  • Cryomagnetic system for the acoustic de Haas-van Alphen measurement

    Sakatsume, S., Matsui, H., Settai, R., Nakamura, S., Ohtani, Y., Kasahara, S., Goto, T.

    Physica B: Physics of Condensed Matter   186-188 ( C )   1993

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    DOI: 10.1016/0921-4526(93)90524-A

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  • Superconductivity and magnetism under anisotropic pressure in FeSe

    山中瑛介, 川島千弦, 石田康平, 高橋博樹, 上床美也, 郷地順, 松浦康平, 水上雄太, 芝内孝禎, 藤原直樹, 松田祐司, 笠原成

    日本物理学会講演概要集(CD-ROM)   76 ( 2 )   2021

  • Vortex-flow Hall effect and vortex phase diagram in FeSe single crystals

    上野龍司, 家永紘一郎, 金子真一, 笠原成, 松田祐司, 大熊哲

    日本物理学会講演概要集(CD-ROM)   76 ( 1 )   2021

  • Non-Fermi liquid transport properties near the nematic quantum critical point of FeSe1-xSx

    黄文凱, 細井優, 笠原成, 佐藤雄貴, 笠原裕一, 松浦康平, 水上雄太, 紺谷浩, 芝内孝禎, 松田祐司

    京都大学物性科学センター誌   ( 36 )   2020

  • FeSe1-xSx(x=0.05,0.12,0.23)の常圧での核磁気共鳴

    中村昂矢, 桑山昂典, 松浦康平, 水上雄大, 笠原成, 松田祐司, 芝内孝禎, 上床美也, 藤原直樹

    京都大学物性科学センター誌   ( 36 )   2020

  • High-field superconducting phase of FeSe under c-axis magnetic field

    鈴木裕貴, 佐藤雄貴, 村山陽奈子, 笠原成, 笠原裕一, 花栗哲郎, 町田理, 芝内孝禎, 松田祐司

    日本物理学会講演概要集(CD-ROM)   75 ( 1 )   2020

  • High-field superconducting phase of FeSe under c-axis magnetic field

    鈴木裕貴, 佐藤雄貴, 村山陽奈子, 笠原成, 笠原裕一, 花栗哲郎, 町田理, 芝内孝禎, 松田祐司

    日本物理学会講演概要集(CD-ROM)   75 ( 2 )   2020

  • 77Se-NMR study on FeSe1-xSx (x = 0.05) under high pressure

    猪股和也, 中村昂矢, 桑山昂典, 松浦康平, 水上雄太, 笠原成, 松田祐司, 芝内孝禎, 上床美也, 藤原直樹

    日本物理学会講演概要集(CD-ROM)   75 ( 2 )   2020

  • 77Se-NMR study on FeSe1-xSx (x = 018) at high pressure

    中村昂矢, 桑山昂典, 猪俣和也, 松浦康平, 水上雄大, 笠原成, 松田祐司, 芝内孝禎, 上床美也, 藤原直樹

    日本物理学会講演概要集(CD-ROM)   75 ( 2 )   2020

  • FeSe1-xSx(x > 0.20) における圧力下77Se-NMR測定(口頭発表)

    桑山昂典, 松浦康平, 水上雄太, 笠原成, 松田祐司, 芝内孝禎, 上床美也, 藤原直樹

    日本物理学会講演概要集 第74回年次大会   74 ( 1 )   1948 - 1948   2019.3

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  • FeSe1-xSx(x=0.05,0.12,0.23)の常圧での核磁気共鳴

    中村昂矢, 桑山昂典, 松浦康平, 水上雄太, 笠原成, 松田祐司, 芝内孝禎, 上床美也, 藤原直樹

    日本物理学会講演概要集(CD-ROM)   74 ( 2 )   2019

  • FeSe1-xSx(x=0.12)における高圧下77Se-NMR測定

    桑山昂典, 松浦康平, 水上雄太, 笠原成, 松田祐司, 芝内孝禎, 上床美也, 藤原直樹

    京都大学物性科学センター誌   ( 34 )   2019

  • FeSe1-xSx(x=0.12)の圧力誘起反強磁性相近傍でのNMR測定

    桑山昂典, 松浦康平, 水上雄太, 笠原成, 松田祐司, 芝内孝禎, 上床美也, 藤原直樹

    日本物理学会講演概要集(CD-ROM)   74 ( 1 )   2019

  • FeSe単結晶の異方的圧力効果 II

    三嶽晶弘, 新里拓巳, 川島千弦, 高橋博樹, 郷地順, 上床美也, 松浦康平, 新井佑基, 水上雄太, 芝内孝禎, 藤原直樹, 笠原成, 松田祐司

    日本物理学会講演概要集(CD-ROM)   74 ( 1 )   2019

  • キュービックアンビルプレスによるFeSe単結晶の異方的圧力効果 II

    三嶽晶弘, 新里拓巳, 川島千弦, 郷地順, 上床美也, 松浦康平, 新井佑基, 水上雄太, 芝内孝禎, 藤原直樹, 笠原成, 松田祐司, 高橋博樹

    高圧討論会講演要旨集   60th   2019

  • FeSe1-xSx(x=0.12)の圧力誘起反強磁性と超伝導

    桑山昂典, 松浦康平, 水上雄太, 笠原成, 松田祐司, 芝内考禎, 上床美也, 藤原直樹

    高圧討論会講演要旨集   60th   2019

  • FeSe1-xSx(x=0.12)の反強磁性相における高圧下77Se-NMR測定

    桑山昂典, 松浦康平, 水上雄太, 笠原成, 松田祐司, 芝内孝禎, 上床美也, 藤原直樹

    日本物理学会講演概要集(CD-ROM)   74 ( 2 )   2019

  • FeSeにおける磁場誘起超伝導-超伝導転移の分光イメージング

    花栗哲郎, 町田理, 笠原成, 芝内孝禎, 松田祐司

    日本物理学会講演概要集(CD-ROM)   74 ( 2 )   2019

  • HドープしたLaFeAsOとSドープしたFeSeの高圧下NMRからみた電子相図

    藤原直樹, 桑山昂典, 中川悟志, 飯村壮史, 松石聡, 細野秀雄, 細野秀雄, 松浦康平, 水上雄太, 笠原成, 松田裕司, 芝内孝禎, 上床美也

    高圧討論会講演要旨集   59th   133   2018.11

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  • 圧力誘起高温超伝導体FeSe1-xSx(x=0.12)の二つの超伝導状態と潜在的量子臨界性

    桑山昂典, 松浦康平, 水上雄太, 笠原成, 松田祐司, 芝内考禎, 上床美也, 藤原直樹

    高圧討論会講演要旨集   59th   77   2018.11

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  • キュービックアンビルプレスによるFeSe単結晶の異方的圧力効果

    三嶽晶弘, 新里拓巳, 川島千弦, 高橋博樹, 郷地順, 上床美也, 松浦康平, 新井佑基, 水上雄太, 芝内孝禎, 藤原直樹, 笠原成, 松田祐司

    高圧討論会講演要旨集   59th   174   2018.11

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  • FeSe1-xSx(x=0.12)の磁気秩序相近傍における77Se‐NMR測定

    桑山昂典, 松浦康平, 水上雄太, 笠原成, 松田祐司, 芝内孝禎, 上床美也, 藤原直樹

    日本物理学会講演概要集(CD-ROM)   73 ( 2 )   ROMBUNNO.9aB203‐11   2018.9

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  • Fe(Se,S)の正方晶相におけるSTM測定

    佐野大樹, 末松知夏, 成塚政裕, 土師将裕, 谷口智哉, 笠原成, 笠原裕一, 芝内孝禎, 花栗哲郎, 松田祐司

    日本物理学会講演概要集(CD-ROM)   73 ( 2 )   ROMBUNNO.10aB203‐2   2018.9

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  • カイラル超伝導体URu2Si2の超伝導状態における熱ホール効果

    村山陽奈子, 佐藤雄貴, 栗原遼, 笠原成, 笠原裕一, 芳賀芳範, 松田達磨, 山本悦嗣, 大貫惇睦, 松田祐司

    日本物理学会講演概要集(CD-ROM)   73 ( 2 )   ROMBUNNO.11pB202‐2   2018.9

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  • FeSe双晶境界のエッジで見られる局所超伝導状態

    成塚政裕, 土師将裕, 末松知夏, 佐野大樹, 谷口智哉, 笠原成, 笠原裕一, 松田祐司

    日本物理学会講演概要集(CD-ROM)   73 ( 2 )   ROMBUNNO.10pPSB‐4   2018.9

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  • 鉄系超伝導体Fe(Se,S)における熱電効果測定

    笠原成, HUANG W, 笠原裕一, 芝内孝禎, 松田祐司

    日本物理学会講演概要集(CD-ROM)   73 ( 2 )   ROMBUNNO.11aB203‐8   2018.9

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  • FeSe単結晶の異方的圧力効果

    三嶽晶弘, 新里拓巳, 川島千弦, 高橋博樹, 郷地順, 上床美也, 松浦康平, 新井佑基, 水上雄太, 芝内孝禎, 藤原直樹, 笠原成, 松田祐司

    日本物理学会講演概要集(CD-ROM)   73 ( 2 )   ROMBUNNO.10pPSB‐12   2018.9

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  • 鉄系超伝導体FeSe1-xSxの高置換量における圧力下電気抵抗測定

    杉村優一, 松浦康平, 新井佑基, 向笠清隆, 水上雄太, 笠原成, 松田祐司, 上床美也, 芝内孝禎

    日本物理学会講演概要集(CD-ROM)   73 ( 2 )   ROMBUNNO.11aB203‐9 - 1755   2018.9

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    DOI: 10.11316/jpsgaiyo.73.2.0_1755

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  • 鉄系超伝導体FeSeの(π,π)磁気励起

    社本真一, 池内和彦, 梶本亮一, 石角元志, 伊藤孝, 綿重達哉, 笠原成, 中村充孝, CHANG Lieh‐Jeng, 芝内孝禎, 松田祐司

    日本物理学会講演概要集(CD-ROM)   73 ( 2 )   ROMBUNNO.9aB203‐5   2018.9

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  • Sr2Ir1-xRhxO4の隠れた秩序状態における回転対称性の破れ

    栗原遼, 村山陽奈子, 佐藤雄貴, 笠原成, 笠原裕一, CAO G, HSIEH D, 松田祐司

    日本物理学会講演概要集(CD-ROM)   73 ( 2 )   ROMBUNNO.9pB202‐8   2018.9

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  • レーザー角度分解光電子分光によるFe(Se,S)のBCS‐BECクロスオーバー領域での電子状態の観測 2

    橋本嵩広, 大田由一, 都築章宏, 長島椿, 福島昭子, 笠原成, 松田祐司, 松浦康平, 水上雄太, 芝内孝禎, 岡崎浩三, 辛埴

    日本物理学会講演概要集(CD-ROM)   73 ( 2 )   ROMBUNNO.9aB203‐3 - 2340   2018.9

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    DOI: 10.11316/jpsgaiyo.73.1.0_2340

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  • 量子スピン液体候補物質1T‐TaS2における遍歴・局在ギャップレス励起の共存

    谷口智哉, 村山陽奈子, 佐藤雄貴, XING X. Z, 笠原成, 笠原裕一, 吉田将郎, 岩佐義宏, 岩佐義宏, 松田祐司

    日本物理学会講演概要集(CD-ROM)   73 ( 2 )   ROMBUNNO.10pC210‐8   2018.9

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  • BCS‐BECクロスオーバー伝導体FeSeの超伝導ギャップに対する磁場温度効果

    花栗哲郎, 笠原成, 芝内孝禎, 松田祐司

    日本物理学会講演概要集(CD-ROM)   73 ( 2 )   ROMBUNNO.10aB203‐1 - 1492   2018.9

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    DOI: 10.11316/jpsgaiyo.73.2.0_1492

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  • パルス電流を用いたFeSe単結晶の渦糸固体相における輸送現象測定 II

    高石浩行, 家永紘一郎, 金子真一, 笠原成, 松田祐司, 大熊哲

    日本物理学会講演概要集(CD-ROM)   73 ( 2 )   ROMBUNNO.11pPSA‐42 - 1672   2018.9

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    DOI: 10.11316/jpsgaiyo.73.1.0_1672

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  • 鉄系超伝導体FeSeにおける面内一軸圧効果

    細井優, 細井優, BARTLETT J, STEPPKE A, MACKENZIE A, HICKS C, 水上雄太, 笠原成, 松田祐司, 井澤公一, 芝内孝禎

    日本物理学会講演概要集(CD-ROM)   73 ( 2 )   ROMBUNNO.11aB203‐10   2018.9

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  • STM/STS measurements on heavy fermion compound CeRhIn&lt;sub&gt;5&lt;/sub&gt; thin films

    土師将裕, 末松友夏, 鳥井陽平, 佐野大樹, 笠原成, 笠原裕一, 花栗哲郎, 芝内孝禎, 寺嶋孝仁, 松田祐司

    京都大学物性科学センター誌   ( 32 )   29   2018.6

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  • STMによるCeCoIn5におけるQ‐phaseの観測

    末松知夏, 土師将裕, 佐野大樹, 鳥井陽平, 笠原成, 笠原裕一, 寺嶋孝仁, 芝内孝禎, 花栗哲郎, 松田祐司

    京都大学物性科学センター誌   ( 32 )   30   2018.6

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  • 115In‐NMR/NQRで観る人工超格子CeCoIn5/CeRhIn5及びエピタキシャル膜CeRhIn5の磁気構造の層数依存性

    仲嶺元輝, 山中隆義, 北川俊作, 石田憲二, 石井智大, 成塚政裕, 鳥井陽平, 下澤雅明, 宍戸寛明, 宍戸寛明, 笠原成, 常盤欣文, 笠原裕一, 水上雄太, 芝内孝禎, 寺嶋孝仁, 松田祐司

    日本物理学会講演概要集(CD-ROM)   73 ( 1 )   ROMBUNNO.24pK504‐1   2018.3

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  • パルス電流を用いたFeSe単結晶の渦糸固体相における輸送現象測定

    高石浩行, 家永紘一郎, 金子真一, 笠原成, 松田祐司, 大熊哲

    日本物理学会講演概要集(CD-ROM)   73 ( 1 )   ROMBUNNO.24pPSA‐28 - 1672   2018.3

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    DOI: 10.11316/jpsgaiyo.73.1.0_1672

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  • Hg系銅酸化物高温超伝導体の擬ギャップ状態におけるダイアゴナルネマティシティ

    村山陽奈子, 佐藤雄貴, 笠原成, 笠原裕一, 芝内孝禎, 内山裕士, 松田祐司

    日本物理学会講演概要集(CD-ROM)   73 ( 1 )   ROMBUNNO.22aK404‐6   2018.3

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  • 時間分解ARPESによるFeSeのネマティック軌道揺らぎの観測

    下志万貴博, 鈴木裕也, 中村飛鳥, 三石夏樹, 笠原成, 芝内孝禎, 松田祐司, 石田行章, 辛埴, 石坂香子, 石坂香子

    日本物理学会講演概要集(CD-ROM)   73 ( 1 )   ROMBUNNO.25aK505‐4   2018.3

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  • FeSe1-xSx(x=0.12)の高圧下77Se‐NMRによる緩和時間T1の測定

    桑山昂典, 松浦康平, 水上雄太, 笠原成, 松田祐司, 芝内孝禎, 上床美也, 藤原直樹

    日本物理学会講演概要集(CD-ROM)   73 ( 1 )   ROMBUNNO.25aK505‐7 - 2338   2018.3

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    DOI: 10.11316/jpsgaiyo.73.1.0_2338

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  • Fe(Se,S)の正方晶相における超伝導状態の比熱測定

    水上雄太, 田中桜平, 松浦康平, WANG H, 谷口智哉, 綿重達哉, 笠原成, 笠原裕一, 松田祐司, 芝内孝禎

    日本物理学会講演概要集(CD-ROM)   73 ( 1 )   ROMBUNNO.25aK505‐8 - 2339   2018.3

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    DOI: 10.11316/jpsgaiyo.73.1.0_2339

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  • レーザー角度分解光電子分光によるFe(Se,S)のBCS‐BECクロスオーバー領域での電子状態の観測

    橋本嵩広, 大田由一, 都築章宏, 長島椿, 笠原成, 松田祐司, 松浦康平, 芝内孝禎, 岡崎浩三, SHIN S

    日本物理学会講演概要集(CD-ROM)   73 ( 1 )   ROMBUNNO.25aK505‐9 - 2340   2018.3

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    DOI: 10.11316/jpsgaiyo.73.1.0_2340

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  • 1T‐TaS2のスピン液体状態における低エネルギー準粒子励起

    中村聡史, 村山陽奈子, 佐藤雄貴, XING X.Z, 笠原成, 笠原裕一, 吉田将郎, 岩佐義宏, 岩佐義宏, 松田祐司

    日本物理学会講演概要集(CD-ROM)   73 ( 1 )   ROMBUNNO.24pK305‐9   2018.3

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  • 近藤絶縁体YbB12における中性フェルミオン励起の観測

    佐藤雄貴, XING Xiangzhuo, 谷口智哉, 中村聡史, 笠原成, 笠原裕一, 田中桜平, 水上雄太, 芝内孝禎, XIANG Ziji, LAWSON Benjamin, LI Lu, 伊賀文俊, 松田祐司

    日本物理学会講演概要集(CD-ROM)   73 ( 1 )   ROMBUNNO.22pK504‐12   2018.3

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  • Ce1-xNdxCoIn5における不純物誘起Q‐phaseのSTM観察

    末松知夏, 土師将裕, 佐野大樹, 鳥井陽平, 笠原成, 笠原裕一, 寺嶋孝仁, 芝内孝禎, 花栗哲郎, 松田祐司

    日本物理学会講演概要集(CD-ROM)   73 ( 1 )   ROMBUNNO.24pK504‐4   2018.3

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  • STMを用いたCeRhIn5における混成ギャップの観測

    佐野大樹, 鳥井陽平, 末松知夏, 土師将裕, 笠原成, 笠原裕一, 寺嶋孝仁, 芝内孝禎, 花栗哲郎, 松田祐司

    日本物理学会講演概要集(CD-ROM)   73 ( 1 )   ROMBUNNO.24pK504‐5 - 2282   2018.3

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    DOI: 10.11316/jpsgaiyo.73.1.0_2282

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  • SをドープしたFeSe系における77Se-NMR測定

    桑山昂典, 松浦康平, 水上雄太, 笠原成, 松田祐司, 芝内孝禎, 上床美也, 藤原直樹

    京都大学物性科学センター誌   ( 32 )   2018

  • FeSe1-xSx(x=0.12) の高圧下 NMR 測定 (口頭発表)

    桑山昂典, 藤原直樹, 松浦康平, 水上雄太, 笠原成, 松田祐司, 芝内孝禎, 上床美也

    第58回高圧討論会   27 ( 特別号 )   179 - 179   2017.11

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  • FeSe1-xSx(x=0.12)の高圧下NMR測定

    桑山昂典, 藤原直樹, 松浦康平, 水上雄太, 笠原成, 松田祐司, 芝内考禎, 上床美也

    高圧討論会講演要旨集   58th   179   2017.10

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  • 重い電子系化合物CeRhIn5薄膜のSTM/STS測定

    鳥井陽平, 末松知夏, 土師将裕, 笠原成, 笠原裕一, 寺嶋孝仁, 芝内孝禎, 花栗哲郎, 松田祐司

    日本物理学会講演概要集(CD-ROM)   72 ( 2 )   ROMBUNNO.22aF21‐9   2017.9

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  • 高次高調波レーザー時間分解光電子分光法によるFeSeのコヒーレントフォノン観測

    鈴木剛, 染谷隆史, 橋本嵩広, 道前翔矢, 渡邉真莉, 藤澤正美, 金井輝人, 石井順久, 板谷治郎, 芝内孝禎, 笠原成, 松田裕司, 岡崎浩三, 辛埴

    日本物理学会講演概要集(CD-ROM)   72 ( 2 )   ROMBUNNO.23aC10‐3   2017.9

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  • 31P‐NMRによる単結晶BaFe2(As1-xPx)2の反強磁性と超伝導の圧力変化の研究

    河村健志, 北川俊作, 石田憲二, 笠原成, 松田祐司, 寺嶋孝仁, 芝内孝禎, 水上雄太

    日本物理学会講演概要集(CD-ROM)   72 ( 2 )   ROMBUNNO.21aC10‐6   2017.9

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  • NMR/NQRによる重い電子系人工超格子CeCoIn5/CeRhIn5及びCeRhIn5単結晶膜の磁気状態の研究

    仲嶺元輝, 山中隆義, 北川俊作, 石田憲二, 石井智大, 成塚政裕, 鳥井陽平, 下澤雅明, 宍戸寛明, 宍戸寛明, 笠原成, 常盤欣文, 笠原裕一, 水上雄太, 芝内孝禎, 寺嶋孝仁, 松田祐司

    日本物理学会講演概要集(CD-ROM)   72 ( 2 )   ROMBUNNO.22aF21‐10   2017.9

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  • FeSe1-xSxのバンド構造と超伝導に対するネマティシティの効果

    花栗哲郎, 岩谷克也, 幸坂祐生, 町田理, 綿重達哉, 笠原成, 芝内孝禎, 松田祐司

    日本物理学会講演概要集(CD-ROM)   72 ( 2 )   ROMBUNNO.22aC10‐6   2017.9

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  • 鉄系超伝導体FeSe1-xSxの温度・圧力・化学置換の三次元電子相図

    杉村優一, 松浦康平, 新井佑基, 向笠清隆, 水上雄太, 綿重達也, 笠原成, 松田祐司, 上床美也, 芝内孝禎

    日本物理学会講演概要集(CD-ROM)   72 ( 2 )   ROMBUNNO.22aC10‐7 - 1669   2017.9

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    DOI: 10.11316/jpsgaiyo.72.2.0_1669

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  • 正方晶HgBa2CuO4+δの擬ギャップ状態における四回対称性の破れ

    村山陽奈子, 佐藤雄貴, 笠原成, 笠原裕一, 芝内孝禎, 内山裕士, 松田祐司

    日本物理学会講演概要集(CD-ROM)   72 ( 2 )   ROMBUNNO.23pC10‐10   2017.9

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  • 鉄系超伝導体Fe(Se,S)の超伝導ギャップ異方性

    谷口智哉, 佐藤雄貴, XING Xiangzhou, 笠原成, 常盤欣文, 笠原裕一, 芝内孝禎, 松田祐司

    日本物理学会講演概要集(CD-ROM)   72 ( 2 )   ROMBUNNO.22aC10‐5   2017.9

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  • パルス電流を用いたFeSe単結晶の渦糸フロー測定

    高石浩行, 家永紘一郎, 金子真一, 笠原成, 松田祐司, 大熊哲

    日本物理学会講演概要集(CD-ROM)   72 ( 2 )   ROMBUNNO.22aPS‐42 - 1337   2017.9

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    DOI: 10.11316/jpsgaiyo.72.2.0_1337

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  • STMから見る重い電子系超伝導体CeCoIn5における非磁性不純物効果

    土師将裕, 鳥井陽平, 笠原成, 笠原裕一, 芝内孝禎, 寺嶋孝仁, 松田祐司

    日本物理学会講演概要集(CD-ROM)   72 ( 2 )   ROMBUNNO.22aF21‐8   2017.9

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  • STMから見る近藤格子系CeCoIn5における磁性不純物周りの電子状態

    末松知夏, 土師将裕, 鳥井陽平, 笠原成, 笠原裕一, 寺嶋孝仁, 芝内孝禎, 花栗哲郎, 松田祐司

    日本物理学会講演概要集(CD-ROM)   72 ( 2 )   ROMBUNNO.22aF21‐7   2017.9

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  • 近藤絶縁体YbB12の熱伝導率・比熱測定

    佐藤雄貴, XING Xiangzhuo, 谷口智哉, 笠原成, 笠原裕一, 常盤欣文, 芝内孝禎, 伊賀文俊, 松田祐司

    日本物理学会講演概要集(CD-ROM)   72 ( 2 )   ROMBUNNO.23pF21‐14   2017.9

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  • FeSe1-xSx(x=0.12)の核磁気共鳴

    桑山昂典, 藤原直樹, 松浦康平, 水上雄太, 笠原成, 松田祐司, 芝内孝禎, 上床美也

    日本物理学会講演概要集(CD-ROM)   72 ( 2 )   ROMBUNNO.22aC10‐8   2017.9

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  • レーザー励起光電子顕微鏡によるFeSeにおけるネマティック秩序のドメイン観察

    元結啓仁, 谷内敏之, 下志万貴博, 岡崎浩三, 笠原成, 芝内孝禎, 松田祐司, 辛埴

    日本物理学会講演概要集(CD-ROM)   72 ( 2 )   ROMBUNNO.23aC10‐4   2017.9

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  • FeSe1-xSx(x = 0.12)の核磁気共鳴(口頭発表)

    桑山昂典, 藤原直樹, 松浦康平, 水上雄太, 笠原成, 松田祐司, 芝内孝禎, 上床美也

    日本物理学会講演概要集 2017年秋季大会   72 ( 2 )   1670 - 1670   2017.9

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  • 鉄系超伝導体FeSeを用いたvan der Waals junction

    橋本浩法, 綿重達哉, 笠原成, 寺嶋孝仁, 芝内孝禎, 笠原裕一, 松田祐司

    京都大学物性科学センター誌   ( 30 )   35   2017.6

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  • HgBa2CuO4+δの擬ギャップ状態におけるネマティシティ

    村山陽奈子, 佐藤雄貴, 笠原成, 笠原祐一, 芝内孝禎, 内山裕士, 松田祐司

    京都大学物性科学センター誌   ( 30 )   37   2017.6

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  • STM/STSからみたCeCoIn5薄膜における近藤ホールの電子状態

    鳥井陽平, 土師将裕, HUANG Wen‐Kai, 笠原成, 笠原裕一, 寺嶋孝仁, 芝内孝禎, 花栗哲郎, 松田祐司

    京都大学物性科学センター誌   ( 30 )   35   2017.6

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  • CeCoIn5系トリコロール超格子によるPauli対破壊効果の人工制御

    三宅聡平, 石井智大, 成塚政裕, 鳥井陽平, 笠原成, 常盤欣文, 笠原裕一, 寺嶋孝仁, 石田憲二, 松田祐司, 芝内孝禎, 下澤雅明

    京都大学物性科学センター誌   ( 30 )   36   2017.6

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  • 鉄系超伝導体Fe(Se1-xSx)における77Se‐NMR

    旋安路, 北川俊作, 石田憲二, 綿重達哉, 笠原成, 松田祐司, BOEHMER A, SCHWEISS P, WOLF T, MEINGAST C

    京都大学物性科学センター誌   ( 30 )   26   2017.6

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  • 59Co‐NMRによる人工超格子CeCoIn5/CeRhIn5とCeCoIn5/YbCoIn5の比較

    仲嶺元輝, 山中隆義, 北川俊作, 石田憲二, 石井智大, 成塚政裕, 鳥井陽平, 下澤雅明, 宍戸寛明, 宍戸寛明, 笠原成, 常盤欣文, 笠原裕一, 水上雄太, 芝内孝禎, 寺嶋孝仁, 松田祐司

    京都大学物性科学センター誌   ( 30 )   31   2017.6

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  • 鉄系超伝導体Fe(Se,S)単結晶の比熱測定

    谷口智哉, 綿重達哉, 笠原成, 常盤欣文, 笠原裕一, 芝内孝禎, 松田祐司

    京都大学物性科学センター誌   ( 30 )   36   2017.6

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  • FeSe1-xSxにおける熱輸送現象

    佐藤雄貴, 村山陽奈子, 山下卓也, 寺澤大樹, 大西隆文, 綿重達哉, 笠原成, 笠原裕一, 芝内孝禎, 松田祐司

    京都大学物性科学センター誌   ( 30 )   34   2017.6

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  • 極低温STM/STSを用いた準粒子干渉測定からみるCeCoIn5における近藤ホールの電子状態

    土師将裕, 鳥井陽平, HUANG Wen‐Kai, 笠原成, 笠原裕一, 花栗哲郎, 芝内孝禎, 寺嶋孝仁, 松田祐司

    京都大学物性科学センター誌   ( 30 )   32   2017.6

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  • ネマティック転移を伴う擬ギャップ相

    笠原成

    日本物理学会講演概要集(CD-ROM)   72 ( 1 )   ROMBUNNO.19pH12‐3   2017.3

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  • 鉄系超伝導体FeSeを用いたvan der Waals junction

    橋本浩法, 綿重達哉, 笠原成, 寺嶋孝仁, 芝内孝禎, 笠原裕一, 松田祐司

    日本物理学会講演概要集(CD-ROM)   72 ( 1 )   ROMBUNNO.18aK‐PS‐21   2017.3

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  • STM/STSからみたCeCoIn5薄膜における近藤ホールの電子状態 I

    鳥井陽平, 土師将裕, HUANG Wen‐Kai, 笠原成, 笠原裕一, 寺嶋孝仁, 芝内孝禎, 花栗哲郎, 松田祐司

    日本物理学会講演概要集(CD-ROM)   72 ( 1 )   ROMBUNNO.17pH11‐3   2017.3

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  • Fe(Se,S)純良単結晶における高圧下X線回折

    水上雄太, 松浦康平, 細井優, 石田浩祐, 綿重達哉, 笠原成, 前島尚行, 町田晃彦, 綿貫徹, 福田竜生, 矢島健, 廣井善二, 松田祐司, 芝内孝禎

    日本物理学会講演概要集(CD-ROM)   72 ( 1 )   ROMBUNNO.18aL42‐13 - 2078   2017.3

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    DOI: 10.11316/jpsgaiyo.72.1.0_2078

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  • 77Se‐NMRによる鉄系超伝導体Fe(Se1-xSx)系物質の研究

    施安路, 北川俊作, 石田憲二, 綿重達哉, 笠原成, 松田祐司, BOEHMER A, SCHWEISS P, WOLF T, MEINGAST C

    日本物理学会講演概要集(CD-ROM)   72 ( 1 )   ROMBUNNO.18aK‐PS‐22   2017.3

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  • HgBa2CuO4+δの擬ギャップ状態におけるネマティシティ

    村山陽奈子, 佐藤雄貴, 笠原成, 笠原裕一, 芝内孝禎, 内山裕士, 松田祐司

    日本物理学会講演概要集(CD-ROM)   72 ( 1 )   ROMBUNNO.20aL42‐9   2017.3

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  • FeSe1-xSxにおける熱輸送現象

    佐藤雄貴, 村山陽奈子, 山下卓也, 寺澤大樹, 大西隆文, 綿重達哉, 笠原成, 笠原裕一, 芝内孝禎, 松田祐司

    日本物理学会講演概要集(CD-ROM)   72 ( 1 )   ROMBUNNO.18aL42‐11   2017.3

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  • STM/STSからみたCeColn5薄膜における近藤ホールの電子状態 II

    土師将裕, 鳥井陽平, HUANG Wen‐Kai, 笠原成, 笠原裕一, 寺嶋孝仁, 芝内孝禎, 花栗哲郎, 松田祐司

    日本物理学会講演概要集(CD-ROM)   72 ( 1 )   ROMBUNNO.17pH11‐4   2017.3

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  • レーザー角度分解光電子分光によるFe(Se,S)の超伝導ギャップの観測

    橋本嵩広, 大田由一, 都築章宏, 渡部俊太郎, CHEN C.‐T, 綿重達哉, 小林遼, 笠原成, 松田祐司, 芝内孝禎, 岡崎浩三, 辛埴

    日本物理学会講演概要集(CD-ROM)   72 ( 1 )   ROMBUNNO.17aK31‐4   2017.3

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  • 59Co‐NMRによる人工超格子CeCoIn5/CeRhIn5とCeCoIn5/YbCoIn5の比較

    仲嶺元輝, 山中隆義, 北川俊作, 石田憲二, 石井智大, 成塚政裕, 鳥井陽平, 下澤雅明, 宍戸寛明, 宍戸寛明, 笠原成, 常盤欣文, 笠原裕一, 水上雄太, 芝内孝禎, 寺嶋孝仁, 松田祐司

    日本物理学会講演概要集(CD-ROM)   72 ( 1 )   ROMBUNNO.17pH11‐8   2017.3

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  • 層数制御したCeCoIn5/CeRhIn5ハイブリッド超格子における超伝導と磁性

    三宅聡平, 石井智大, 成塚政裕, 鳥井陽平, 下澤雅明, 笠原成, 笠原裕一, 芝内孝禎, 寺嶋孝仁, 松田祐司

    日本物理学会講演概要集(CD-ROM)   72 ( 1 )   ROMBUNNO.17pH11‐6   2017.3

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  • 鉄系超伝導体Fe(Se,S)単結晶の比熱測定

    谷口智哉, 綿重達哉, 笠原成, 常盤欣文, 笠原裕一, 芝内孝禎, 松田祐司

    日本物理学会講演概要集(CD-ROM)   72 ( 1 )   ROMBUNNO.18aL42‐12   2017.3

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  • 31P‐NMRでみる単結晶BaFe2(As1-xPx)2における圧力とP置換の類似性

    河村健志, 北川俊作, 石田憲二, 笠原成, 松田祐司, 寺嶋孝仁

    日本物理学会講演概要集(CD-ROM)   72 ( 1 )   ROMBUNNO.17pL42‐6   2017.3

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  • トリコロール近藤超格子におけるエキゾチック超伝導相

    石井智大, 成塚政裕, 三宅聡平, 下澤雅明, 笠原成, 笠原裕一, 芝内孝禎, 寺嶋孝仁, 石田憲二, 松田祐司

    日本物理学会講演概要集(CD-ROM)   72 ( 1 )   ROMBUNNO.17pH11‐9   2017.3

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  • 鉄系超伝導体FeSe1-xSxにおけるネマティック量子臨界点の研究

    細井優, 松浦康平, 石田浩祐, WANG Hao, 水上雄太, 綿重達哉, 笠原成, 松田祐司, 芝内孝禎

    日本物理学会講演概要集(CD-ROM)   71 ( 2 )   ROMBUNNO.13pJA‐7 - 1770   2016.9

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  • 77Se‐NMRによる鉄系超伝導体Fe(Se1-xSx)系物質の研究

    SHI A, 北川俊作, 石田憲二, 綿重達哉, 笠原成, 松田祐司

    日本物理学会講演概要集(CD-ROM)   71 ( 2 )   ROMBUNNO.14aJA‐5   2016.9

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  • Fe(Se,S)純良単結晶における電子線照射による影響

    水上雄太, 松浦康平, KONCZYKOWSKI Marcin, 綿重達哉, 笠原成, 松田祐司, 芝内孝禎

    日本物理学会講演概要集(CD-ROM)   71 ( 2 )   ROMBUNNO.15pJA‐8 - 2180   2016.9

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  • 分光イメージングSTMで見たFe(Se,S)の超伝導とネマティシティ

    花栗哲郎, 綿重達哉, 幸坂祐生, 岩谷克也, 町田理, 笠原成, 芝内孝禎, 松田祐司

    日本物理学会講演概要集(CD-ROM)   71 ( 2 )   ROMBUNNO.15aJA‐13 - 2035   2016.9

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  • 鉄系超伝導体FeSe1-xSxの超音波測定

    納口昇也, 赤坂直哉, 堀越啓太, 石塚紘晃, 中村光輝, 中西良樹, 綿重達也, 笠原成, 芝内孝禎, 松田祐司, 吉澤正人

    日本物理学会講演概要集(CD-ROM)   71 ( 2 )   ROMBUNNO.14aPS‐60 - 1896   2016.9

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  • 鉄系超伝導体FeSeの圧力下電子相図に対する化学置換効果

    松浦康平, 新井佑基, 水上雄太, 綿重達哉, 笠原成, 上床美也, 松田祐司, 芝内孝禎

    日本物理学会講演概要集(CD-ROM)   71 ( 2 )   ROMBUNNO.15pJA‐4 - 2176   2016.9

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  • 鉄系超伝導体FeSe単結晶の強磁場下での熱ホール効果

    綿重達哉, ARSENIJEVIC S, 笠原成, 山下卓也, 寺澤大樹, 大西隆史, 常盤欣文, 笠原裕一, 芝内孝禎, WOSNITZA J, 松田祐司

    日本物理学会講演概要集(CD-ROM)   71 ( 2 )   ROMBUNNO.13pJA‐10 - 1773   2016.9

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  • CeRhIn5/CeCoIn5ハイブリッド超格子における圧力下強結合超伝導状態の実現

    成塚政裕, LUO Y, ROSA P.F.S, 石井智大, 鳥井陽平, RONNING F, BAUER E.D, THOMPSON J.D, MOVSHOVICH R, 下澤雅明, 笠原成, 常盤欣文, 笠原裕一, 芝内孝禎, 寺嶋孝仁, 松田祐司

    日本物理学会講演概要集(CD-ROM)   71 ( 2 )   ROMBUNNO.14pJD‐3 - 2000   2016.9

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  • 単結晶BaFe2(As1-xPx)2における量子臨界点付近でのNMR測定

    河村健志, 北川俊作, 石田憲二, 笠原成, 松田祐司, 寺嶋孝仁

    日本物理学会講演概要集(CD-ROM)   71 ( 2 )   ROMBUNNO.14aJA‐3 - 1837   2016.9

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  • レーザー角度分解光電子分光によるFeSeの軌道秩序状態における超伝導ギャップ異方性の観測 2

    橋本嵩広, 大田由一, 山本遇哲, 鈴木裕也, 下志万貴博, 渡部俊太郎, CHEN C.‐T, 綿重達哉, 小林遼, 笠原成, 松田祐司, 芝内孝禎, 岡崎浩三, SHIN S

    日本物理学会講演概要集(CD-ROM)   71 ( 2 )   ROMBUNNO.15aJA‐6 - 2028   2016.9

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  • 重い電子系超伝導化合物CeCoIn5と反強磁性化合物CeRhIn5の人工超格子CeCoIn5/CeRhIn5のNMR

    仲嶺元輝, 山中隆義, 北川俊作, 石田憲二, 石井智大, 成塚政裕, 鳥井陽平, 下澤雅明, 笠原成, 常盤欣文, 笠原裕一, 芝内孝禎, 寺嶋孝仁, 松田祐司

    日本物理学会講演概要集(CD-ROM)   71 ( 2 )   ROMBUNNO.15aPS‐9 - 2076   2016.9

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  • YBa2Cu3O7-δの擬ギャップ状態におけるネマティシティ

    佐藤雄貴, 下山祐介, 笠原成, 笠原裕一, 芝内孝禎, 西嵜照和, CARRINGTON A, PUTZKE C, 松田祐司

    日本物理学会講演概要集(CD-ROM)   71 ( 2 )   ROMBUNNO.14pJC‐5 - 1989   2016.9

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  • FeSeの高圧下高温超伝導相近傍の結晶構造

    松浦康平, 細井優, 石田浩祐, 水上雄太, 綿重達哉, 笠原成, 前島尚行, 町田晃彦, 綿貫徹, 福田竜生, 松田祐司, 芝内孝禎

    日本物理学会講演概要集(CD-ROM)   71 ( 2 )   ROMBUNNO.15pJA‐3 - 2175   2016.9

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  • CeCoIn5系トリコロール超格子によるPauli対破壊効果の人工制御

    三宅聡平, 石井智大, 成塚政裕, 鳥井陽平, 下澤雅明, 笠原成, 常盤欣文, 笠原裕一, 芝内孝禎, 寺嶋孝仁, 石田憲二, 松田祐司

    日本物理学会講演概要集(CD-ROM)   71 ( 2 )   ROMBUNNO.14pJD‐2 - 1999   2016.9

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  • La置換CeCoIn5エピタキシャル薄膜のSTM/STS測定による近藤ホールの観測

    鳥井陽平, 成塚政裕, 綿重達哉, 花岡洋祐, 笠原成, 笠原裕一, 芝内孝禎, 寺嶋孝仁, 花栗哲郎, 松田祐司

    日本物理学会講演概要集(CD-ROM)   71 ( 2 )   ROMBUNNO.14pJD‐6 - 2003   2016.9

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  • 磁気トルク測定でみたYBa2Cu3O7‐δの擬ギャップ状態における回転対称性の破れ

    佐藤雄貴, 下山祐介, 笠原成, 笠原裕一, 芝内孝禎, 西嵜照和, 松田祐司

    京都大学物性科学センター誌   ( 28 )   44   2016.6

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  • 重い電子系化合物CeCoIn5エピタキシャル薄膜のSTM/STS測定

    鳥井陽平, 花岡洋祐, 綿重達哉, 成塚政裕, 笠原成, 笠原裕一, 松田祐司, 寺嶋孝仁

    京都大学物性科学センター誌   ( 28 )   45   2016.6

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  • 重い電子系ハイブリッド超格子CeRhIn5/CeCoIn5における輸送特性

    石井智大, 戸田琳太郎, 鳥井陽平, 成塚政裕, 下澤雅明, 笠原成, 常盤欣文, 笠原裕一, 芝内孝禎, 寺嶋孝仁, 松田祐司

    京都大学物性科学センター誌   ( 28 )   46   2016.6

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  • ハイブリッド超格子CeCoIn5/CeRhIn5における量子臨界性

    石井智大, 鳥井陽平, 戸田琳太郎, 成塚政裕, 下澤雅明, 花岡洋祐, 笠原成, 常盤欣文, 笠原裕一, 芝内孝禎, 寺嶋孝仁, 松田祐司

    日本物理学会講演概要集(CD-ROM)   71 ( 1 )   ROMBUNNO.22ABM‐1 - 2361   2016.3

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  • 中性子非弾性散乱から見た鉄系超伝導体FeSeのスピンネマティック感受率

    社本真一, 梶本亮一, 石角元志, 山川洋一, 綿重達哉, 笠原成, 中村充孝, 紺谷浩, 芝内孝禎, 松田祐司

    日本物理学会講演概要集(CD-ROM)   71 ( 1 )   ROMBUNNO.19ABQ‐14 - 2003   2016.3

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  • ハイブリッド超格子CeCoIn5/CeRhIn5における超伝導特性

    鳥井陽平, 石井智大, 戸田琳太郎, 成塚政裕, 下澤雅明, 花岡洋祐, 笠原成, 常盤欣文, 笠原裕一, 芝内孝禎, 寺嶋孝仁, 松田祐司

    日本物理学会講演概要集(CD-ROM)   71 ( 1 )   ROMBUNNO.22ABM‐2 - 2362   2016.3

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  • FeSeの時間分解角度分解光電子分光

    鈴木裕也, 下志万貴博, 園部竜也, 中村飛鳥, 三石夏樹, 石田行章, SHIN S, 綿重達哉, 小林遼, 笠原成, 芝内孝禎, 松田祐司, 石坂香子

    日本物理学会講演概要集(CD-ROM)   71 ( 1 )   ROMBUNNO.19ABQ‐6   2016.3

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  • FeSeのエキゾチック超伝導‐BCS‐BECクロスオーバー

    笠原成

    日本物理学会講演概要集(CD-ROM)   71 ( 1 )   ROMBUNNO.21PBQ‐7 - 2337   2016.3

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  • FeSe純良単結晶における高圧下電気抵抗率測定

    松浦康平, 水上雄太, 下澤雅明, 松林和幸, 山下穣, 上床美也, 綿重達哉, 笠原成, SUN J. P, YE G. Z, YAN J. Q, SALES B. C, CHENG J.‐G, 松田祐司, 芝内孝禎

    日本物理学会講演概要集(CD-ROM)   71 ( 1 )   ROMBUNNO.22ABQ‐4 - 2385   2016.3

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  • 超精密磁気トルク測定でみたYBa2Cu3O7-δの擬ギャップ状態における回転対称性の破れ

    佐藤雄貴, 下山祐介, 笠原成, 笠原裕一, 芝内孝禎, 西嵜照和, 松田祐司

    日本物理学会講演概要集(CD-ROM)   71 ( 1 )   ROMBUNNO.20PBM‐10 - 2079   2016.3

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  • FeSe純良単結晶における高圧下X線回折

    水上雄太, 松浦康平, 細井優, 綿重達哉, 笠原成, 前島尚行, 町田晃彦, 綿貫徹, 福田竜生, 松田祐司, 芝内孝禎

    日本物理学会講演概要集(CD-ROM)   71 ( 1 )   ROMBUNNO.22ABQ‐5 - 2386   2016.3

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  • 19aPS-40 Ultrasonic measurements of iron-based superconductor Fe(Se_<1-x>S_x)

    Noguchi S, Akasaka N, Horikoshi K, Ishiduka H, Nakamura M, Nakanishi Y, Watashige T, Kasahara S, Shibauchi T, Matsuda Y, Yoshizawa M

    日本物理学会講演概要集   70 ( 2 )   2134 - 2134   2015.9

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  • 18aDB-1 High-pressure phase diagram of FeSe

    Terashima Taichi, Kikugawa Naoki, Kasahara Shigeru, Watashige Tatsuya, Shibauchi Takasada, Matsuda Yuji, Wolf Thomas, Bohmer Anna E, Hardy Frederic, Meingast Christoph, v. Lohneysen Hilbert, Uji Shinya

    日本物理学会講演概要集   70 ( 2 )   1987 - 1987   2015.9

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  • 17aPS-134 Development and validation of scanning SQUID microscopy system

    Shimozawa M, Suzuki Y, Sugii K, Yamashita M, Oyama D, Kawabata M, Kawai J, Kasahara S, Matsuda Y, Sueyoshi T, Mizukami Y, Shibauchi T

    日本物理学会講演概要集   70 ( 2 )   1922 - 1922   2015.9

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  • 17aDB-10 Observation of quantum oscillations and Berry's phase in the ordered state of Fe(Se,S)

    Kasahara S, Yamashita T, Shimoyama Y, Watashige T, Shibauchi T, Matsuda Y, Knafo William, Beard Jerome, Nardone Marc, Watoson Matthew, Coldea Amalia, Meingast Christoph, Wolf Thomas, Lohneysen Hilbert

    日本物理学会講演概要集   70 ( 2 )   1784 - 1784   2015.9

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  • 17aDB-9 Measurements of the nematic susceptibility in Fe(Se,S) iron-based superconductors

    Hosoi S, Kurata S, Kawachi S, Mizukami Y, Watashige T, Kasahara S, Tokunaga M, Matsuda Y, Shibauchi T

    日本物理学会講演概要集   70 ( 2 )   2015.9

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  • 17aDB-5 Effects of impurity scattering controlled by electron irradiation on the quantum critical point and the superconducting phase

    Mizukami Y, Matsuura K, Konczykowski M, Watashige T, Kasahara S, Matsuda Y, Shibauchi T

    日本物理学会講演概要集   70 ( 2 )   2015.9

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  • 17aDA-3 STM/STS measurements on the epitaxial thin films of heavy fermion compound CeCoIn_5 II

    Hanaoka Y, Watashige T, Naritsuka M, Kasahara S, Kasahara Y, Shibauchi T, Terashima T, Hanaguri T, Matsuda Y

    日本物理学会講演概要集   70 ( 2 )   1764 - 1764   2015.9

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  • 17aDA-2 Transport measurements of heavy fermion hybrid superlattices CeRhIn_5/CeCoIn_5

    Ishii T, Endo R, Toda R, Naritsuka M, Shimozawa M, Hanaoka Y, Kasahara S, Tokiwa Y, Kasahara Y, Shibauchi T, Terashima T, Matsuda Y

    日本物理学会講演概要集   70 ( 2 )   1763 - 1763   2015.9

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  • 17aDA-1 Global inversion symmetry breaking in tricolor superlattice of CeCoIn_5

    Naritsuka M, Endo R, Toda R, Ishii T, Shimozawa M, Hanaoka Y, Kasahara S, Tokiwa Y, Kasahara Y, Shibauchi T, Terashima T, Matsuda Y

    日本物理学会講演概要集   70 ( 2 )   1762 - 1762   2015.9

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  • 18pDB-13 Inelastic neutron scattering study of β-FeSe

    Shamoto S, Mori M, Kajimoto R, Kodama K, Ishikado M, Watashige T, Kasahara S, Nakamura M, Shibauchi T, Matsuda Y

    日本物理学会講演概要集   70 ( 2 )   2050 - 2050   2015.9

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  • 18aDB-2 The electronic phase diagram in FeSe under high pressure

    Matsuura K, Mizukami Y, Shimozawa M, Matsubayashi K, Yamashita M, Uwatoko Y, Wolf T, v. Lohneysen H, Watashige T, Kasahara S, Matsuda Y, Shibauchi T

    日本物理学会講演概要集   70 ( 2 )   1988 - 1988   2015.9

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  • 16aDB-9 Observation of superconducting gap anisotropy of FeSe in orbital ordered state by laser ARPES

    Hashimoto T, Ota Y, Yamamoto H, Suzuki Y, Shimojima T, Watanabe S, Chen C.-T, Watashige T, Kobayashi R, Kasahara S, Matsuda Y, Shibauchi T, Bohmer A, Wolf T, Adelmann P, Meingast C, Loehneysen H. v, Okazaki K, Shin S

    日本物理学会講演概要集   70 ( 2 )   2028 - 2028   2015.9

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  • 16aDB-10 Investigation of orbital ordered phase in Fe(Se,S) by angle-resolved photoemission spectroscopy

    Suzuki Y, Shimojima T, Sonobe T, Malaeb W, Shin S, Watashige T, Kobayashi R, Kasahara S, Shibauchi T, Matsuda Y, Ishizaka K

    日本物理学会講演概要集   70 ( 2 )   1685 - 1685   2015.9

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    DOI: 10.11316/jpsgaiyo.70.2.0_1685

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  • 21pBA-17 Friedel oscillations of the superconducting gap in FeSe

    Hanaguri T, Watashige T, Kohsaka Y, Iwaya K, Machida T, Kasahara S, Kobayashi R, Shibauchi T, Matsuda Y, Bohmer A, Wolf T, Meingast C, Lohneysen H. v

    日本物理学会講演概要集   70 ( 1 )   2002 - 2002   2015.3

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    DOI: 10.11316/jpsgaiyo.70.1.0_2002

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  • 21aBA-7 Measurements of the nematic susceptibility in an iron-based superconductor FeSe

    Hosoi S, Kurata S, Kawachi S, Matsuura K, Kobayashi R, Mizukami Y, Watashige T, Kasahara S, Tokunaga M, Matsuda Y, Shibauchi T

    日本物理学会講演概要集   70 ( 1 )   2015.3

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  • 21aBA-11 Nernst and Seebeck coefficients of AFe_2As_2(A=K, Rb, Cs)

    Shimoyama Y, Kasahara S, Yamashita T, Terazawa D, Wolf T, Lohneysen H. v, Shibauchi T, Kasahara Y, Matsuda Y

    日本物理学会講演概要集   70 ( 1 )   1944 - 1944   2015.3

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    DOI: 10.11316/jpsgaiyo.70.1.0_1944

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  • 21aBB-8 Fine tuning of the quantum criticality in the heavy fermion superlattices

    Endo R, Toda T, Hanaoka Y, Shimozawa M, Yamashita T, Shimoyama Y, Kasahara S, Tokiwa Y, Kasahara Y, Shibauchi T, Terashima T, Matsuda Y

    日本物理学会講演概要集   70 ( 1 )   1952 - 1952   2015.3

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    DOI: 10.11316/jpsgaiyo.70.1.0_1952

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  • 21aBB-9 STM/STS measurements on the epitaxial thin films of heavy fermion compound CeCoIn_5

    Watashige T, Hanaoka Y, Kasahara S, Kasahara Y, Shibauchi T, Terashima T, Hanaguri T, Matsuda Y

    日本物理学会講演概要集   70 ( 1 )   1953 - 1953   2015.3

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    DOI: 10.11316/jpsgaiyo.70.1.0_1953

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  • 21aBA-2 Electronic phase diagram of BaFe_2(As_<1-x>P_x)_2 with impurity scattering introduced by electron irradiation

    Matsuura K, Kurata S, Mizukami Y, Konczykowski M, Watashige T, Kasahara S, Matsuda Y, Shibauchi T

    日本物理学会講演概要集   70 ( 1 )   2015.3

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  • 21aBA-8 Torque magnetometry in clean single crystals of FeSe

    Kasahara S, Kobayashi R, Shimoyama Y, Watashige T, Yamashita T, Kasahara Y, Shibauchi T, Matsuda Y, Wolf Thomas, Lohneysen Hilbert

    日本物理学会講演概要集   70 ( 1 )   1941 - 1941   2015.3

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    DOI: 10.11316/jpsgaiyo.70.1.0_1941

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  • 21pBA-13 Normal-state electronic structure of FeSe detected by angle-resolved photoemission spectroscopy (2)

    Suzuki Y, Shimojima T, Sonobe T, Nakamura A, Sakano M, Tsuji H, Omachi J, Yoshioka K, Kuwata-Gonokami M, Ono K, Kumigashira H, Bohmer A. E, Hardy F, Wolf T, Meingast C, Lohnevsen H. v, Watashige T, Kobayashi R, Kasahara S, Ikeda H, Shibauchi T, Matsuda Y, Ishizaka K

    日本物理学会講演概要集   70 ( 1 )   1998 - 1998   2015.3

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    DOI: 10.11316/jpsgaiyo.70.1.0_1998

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  • 9pBD-4 Electrical resistivity and paramagnetic susceptibility measurements of iron-based superconductor FeSe pure single crystals

    Kobayashi R, Watashige T, Kasahara S, Wolf T, Lohneysen H. v, Ikeda H, Shibauchi T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   69 ( 2 )   435 - 435   2014.8

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  • 7pBK-7 Controlling the quantum criticality in heavy fermion superlattices CeRhIn_5/YbRhIn_5

    Hanaoka Y, Endou R, Toda R, Shimozawa M, Kasahara S, Tokiwa Y, Shibauchi T, Terashima T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   69 ( 2 )   344 - 344   2014.8

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  • 9pBD-7 Quantum vortex core in FeSe studied by STM/STS

    Hanaguri T, Watashige T, Kohsaka Y, Iwaya K, Fu Y, Machida T, Kasahara S, Watanabe D, Mizukami Y, Mikami T, Kawamoto Y, Kurata S, Shibauchi T, Matsuda Y, Bohmer A, Wolf T, Meingast C, Lohneysen H. v

    Meeting abstracts of the Physical Society of Japan   69 ( 2 )   436 - 436   2014.8

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  • 9pBD-6 Pulsed field expreiments of the transport properties in clean single crystals of FeSe

    Kasahara S, Yamashita T, Shiimoyama Y, Watashige T, Kobayashi R, Shibauchi T, Matsuda Y, Knafo William, Watoson Matthew, Coidea Amalia, Hardy Frederic, Meingast Christoph, Wolf Thomas, Lohneysen Hilbert

    Meeting abstracts of the Physical Society of Japan   69 ( 2 )   436 - 436   2014.8

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  • 9pBD-5 Observation of Nernst effect of FeSe

    Shimoyama Y, Yamashita T, Endo R, Watashige T, Kasahara S, Kobayashi R, Wolf T, Lohneysen H. v, Shibauchi T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   69 ( 2 )   435 - 435   2014.8

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  • STS測定から見たFeSe純良単結晶の超伝導ギャップ構造

    綿重達哉, 花栗哲郎, 幸坂祐生, 岩谷克也, 付英双, 笠原成, 池田浩章, 渡辺大樹, 水上雄太, 三上拓也, 川本雄太, 蔵田聡, 芝内孝禎, 松田祐司, BOEHMER A, WOLF T, MEINGAST C, V. LOEHNEYSEN H

    京都大学低温物質科学研究センター誌   ( 24 )   40   2014.6

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  • 30aCE-7 Transport measurements of clean FeSe single crystals

    Endou R, Kasahara S, Yamashita T, Watashige T, Mikami T, Terashima T, Shibauchi T, Matsuda Y, Bohmer A. E, Wolf T, Meingast C, Lohneysen H. von

    Meeting abstracts of the Physical Society of Japan   69 ( 1 )   666 - 666   2014.3

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  • 27aCE-2 ^<75>As-, ^<31>P-NMR study of in-plane anisotropy in single crystalline BaFe_2(As_<1-x>P_x)_2

    Iye T, Ishida K, Ikeda H, Kasahara S, Shibauchi T, Matsuda Y, Julien Marc-Henri, Mayaffre Hadrien, Horvatic Mladen, Berthier Claude

    Meeting abstracts of the Physical Society of Japan   69 ( 1 )   543 - 543   2014.3

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  • 27aBE-3 Study of quantum critical phenomena and nematic electronic state in iron-based superconductors

    Kasahara Shigeru

    Meeting abstracts of the Physical Society of Japan   69 ( 1 )   541 - 541   2014.3

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  • FeSeにおける準粒子干渉効果

    花栗哲郎, 綿重達哉, 池田浩章, 幸坂祐生, 岩谷克也, FU Y, 笠原成, 渡辺大樹, 水上雄太, 三上拓也, 川本雄太, 蔵田聡, 芝内孝禎, 松田祐司, BOEHMER A, WOLF T, MEINGAST C, V. LOEHNEYSEN H

    日本物理学会講演概要集   69 ( 1 )   666   2014.3

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  • 30aCE-6 Quasi-particle interference in FeSe

    Hanaguri T, Watashige T, Ikeda H, Kohsaka Y, Iwaya K, Fu Y, Kasahara S, Watanabe D, Mizukami Y, Mikami T, Kawamoto Y, Kurata S, Shibauchi T, Matsuda Y, Bohmer A, Wolf T, Meingast C, Lohneysen H. v

    Meeting abstracts of the Physical Society of Japan   69 ( 1 )   666 - 666   2014.3

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  • 30aCE-5 Superconducting-gap of high-quality FeSe single crystals studied by STM/STS

    Watashige T, Hanaguri T, Kohsaka Y, Iwaya K, Fu Y, Kasahara S, Ikeda H, Watanabe D, Mizukami Y, Mikami T, Kawamoto Y, Kurata S, Shibauchi T, Matsuda Y, Bohmer A, Wolf T, Meingast C, Lohneysen H. v

    Meeting abstracts of the Physical Society of Japan   69 ( 1 )   666 - 666   2014.3

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  • 28aCE-4 Laser-based angle-resolved photoemission spectroscopy on FeSe

    Okazaki K, Horio M, Fujimori A, Ota Y, Yamamoto H. Q, Shin S, Watanabe S, Chen C.-T, Kasahara S, Shibauchi T, Matsuda Y, Bohmer A, Wolf T, Adelmann P, Meingast C, Loehneysen H. v

    Meeting abstracts of the Physical Society of Japan   69 ( 1 )   585 - 585   2014.3

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  • Magnetic properties of point defects introduced by electron irradiation in BaFe_2(As_<1-x>P_x)_2

    Mizukami Y, Kawamoto Y, Kurata S, Mikami T, Hashimoto K, Kasahara S, Konczykowski M, Beek C.J.van der, Boizot B, Prozorov R, Wang Y, Kreisei A, Hirschfeld J.P, Mishra V, Matsuda Y, Shibauchi T

    Meeting abstracts of the Physical Society of Japan   68 ( 2 )   573 - 573   2013.8

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  • Transport measurements on BaFe_2(As_<1-x>P_x)_2 containing point defects introduced by electron irradiation

    Mikami T, Mizukami Y, Kawamoto Y, Kurata S, Kasahara S, Matsuda Y, Shibauchi T, Konczykowski M, Beek C.J.van der, Boizot B, Prozorov R

    Meeting abstracts of the Physical Society of Japan   68 ( 2 )   573 - 573   2013.8

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  • Magnetic penetration depth and thermal conductivity measurements in ultra-clean FeSe single crystals

    Kasahara S, Watanabe D, Mizukami Y, Mikami T, Kawamoto Y, Kurata S, Shibauchi T, Matsuda Y, Boehmr B, Wolf T, Adeomann P, Meingast C

    Meeting abstracts of the Physical Society of Japan   68 ( 2 )   573 - 573   2013.8

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  • Direct observation of lattice distortion at the hidden order transition in URu_2Si_2 by high resolution X-ray measurements

    Tonegawa S, Kasahara S, Tsuruhara Y, Fukuda T, Sugimoto K, Yasuda N, Mizukami Y, Watanabe D, Haga Y, Matsuda T.D, Yamamoto E, Onuki Y, Ikeda H, Matsuda Y, Shibauchi T

    Meeting abstracts of the Physical Society of Japan   68 ( 2 )   553 - 553   2013.8

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  • Themoelectric effect of an iron-based superconductor BaFe_2(As_<1-x>P_x)_2

    Tsuruhara Y, Tonegawa S, Yamshita T, Ishii Wataru, Zengwei Zhu, Benoit Fauque, Kamran Behnia, Kasahara S, Shibauchi T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   68 ( 2 )   527 - 527   2013.8

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  • Single crystal growth and transport measurements of alkaline metals iron pnictides

    Endou R, Watashige T, Kasahara S, Shibauchi T, Matsuda T

    Meeting abstracts of the Physical Society of Japan   68 ( 2 )   526 - 526   2013.8

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  • Doping dependence of the band dispersion and the Fermi surface of BaFe_2(As_<1-x>P_x)_2

    Yoshida T, Ideta S, Nishi I, Suzuki H, Fujimori A, Shimojima T, Shinada K, Ishizaka K, Matae W, Shin S, Mo S.K, Shen Z.X, Husain Z, Nakashima Y, Anzai H, Ino A, Arita M, Namatame H, Taniguchi M, Kumigashira H, Ono K, Kasahara S, Terashima T, Shibauchi T, Matsuda Y, Nakajima M, Uchida S, Tomioka Y, Ito T, Kihou K, Lee C.H, Iyo A, Eisaki H, Ikeda H, Arita R

    Meeting abstracts of the Physical Society of Japan   68 ( 2 )   496 - 496   2013.8

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  • Global and local inversion symmetry breakings in heavy-fermion superconducting superlattices With ABAB' structures

    Endou R, Goh K.Swee, Shimozawa M, Kobayashi R, Nishiyama T, Watanabe D, Ikeda H, Kasahara S, Yanase Y, Terashima T, Shibauchi T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   68 ( 2 )   591 - 591   2013.8

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  • Symmetry breaking and orthorhombic lattice distortion in the electronic nematic state of iron-based superconductors

    KASAHARA Shigeru

    放射光   26 ( 3 )   168 - 172   2013.5

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  • Electronic Nematic Transition and Orthorhombic Distortion in Iron-Based Superconductors

    SHIBAUCHI Takasada, KASAHARA Shigeru, MATSUDA Yuji, FUKUDA Tatsuo, SUGIMOTO Kunihisa

    X-RAYS   55 ( 2 )   128 - 134   2013.4

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    Strongly interacting electrons can exhibit novel collective phases, among which the electronic nematic phases are perhaps the most surprising as they spontaneously break rotational symmetry of the underlying crystal lattice. Our highly sensitive magnetic torque measurements under in-plane field rotation in iron-based superconductors BaFe2(As1-xPx)2 provide evidence for the electronic nematic ordering below a characteristic temperature T*. High-resolution crystal-structure analysis by using synchrotron X-ray reveals small but finite orhthorhobic distortionbelow T* and the orthorhombicity shows a big jump at a lower temperature Ts. The results imply an electronic origin of rotational symmetry breaking, whose relation to superconductivityis discussed.

    DOI: 10.5940/jcrsj.55.128

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  • 29aPS-111 Fabrication of BaFe_2As_2 ultra-thin films by Using PLD method

    Watashige T, Kasahara S, Ishi W, Shimozawa M, Yasumoto S, Terashima T, Shibauchi T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   68 ( 1 )   709 - 709   2013.3

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  • 29aPS-107 Themoelectric property of an iron-based superconductor BaFe_2(As_<1-x>P_x)_2

    Tonegawa S, Yamshita T, Tsuruhara Y, Zhu Zengwei, Fauque Benoit, Behnia Kamran, Kasahara S, Shibauchi T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   68 ( 1 )   708 - 708   2013.3

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  • 26pXY-10 Changes in the superconducting order parameter in BaFe_2(As_<1-x>P_x)_2 induced by controlled impurity scattering by electron irradiation

    Mizukami Y, Kawamoto Y, Hashimoto K, Kasahara S, Konczykowski M, van der Beek C. J, Boizot B, Prozorov R, Wang Y, Kreisel A, Hirschfeld P. J, Mishira Y, Matsuda Y, Shibauchi T

    Meeting abstracts of the Physical Society of Japan   68 ( 1 )   592 - 592   2013.3

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  • 26pXY-9 Doping dependence of the Superconducting gap structure in single crystals LaFeAsO_<1-y> revealed by magnetic penetration depth measurements

    Kurata S, Mizukami Y, Kawamoto Y, Kasahara S, Ishikado M, Ishida S, Kitou H, Iyo A, Eisaki H, Shamoto S, Shibauchi T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   68 ( 1 )   591 - 591   2013.3

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  • 26pXY-8 Superconducting gap structure of over-doped (Ba_<1-x>K_x)Fe_2As_2 probed by penetration depth

    Kawamoto Y, Mizukami Y, Kurata S, Kasahara S, Saito T, Fukazawa H, Kohori H, Ishida S, Kiho K, Iyo A, Lee C. H, Eisaki H, Shibauchi T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   68 ( 1 )   591 - 591   2013.3

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  • 26pXY-7 Superconducting gap structure of overdoped (Ba_<1-x>K_x)Fe_2As_2 probed by thermal conductivity

    Watanabe D, Yamashita T, Kasahara S, Yamashita M, Saito T, Fukazawa H, Kohori Y, Ishida S, Kiho K, Iyo A, Lee C. H, Eisaki H, Vorontsov Anton B, Shibauchi T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   68 ( 1 )   2013.3

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  • 26aXG-9 Pseudogap in BaFe_2(As,P)_2 II

    Sonobe T, Shimojima T, Ideta S, Yoshida T, Fujimori A, Kumigashira H, Ono K, Nakashima Y, Anzai H, Ino A, Arita M, Namatame H, Taniguchi M, Nakajima M, Uchida S, Tomioka Y, Ito T, Kihou K, Lee C.-H, Iyo A, Eisaki H, Kasahara S, Terashima T, Shibauchi T, Matsuda Y, Ishizaka K

    Meeting abstracts of the Physical Society of Japan   68 ( 1 )   575 - 575   2013.3

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  • 29pXG-6 NMR study of in-plane anisotropy in single crystalline BaFe_2(As_<1-x>P_x)_2

    Iye T, Nakai Y, Kitagawa S, Ishida K, Kasahara S, Shibauchi T, Matsuda Y, Terashima T, Mayaffre Hadrien, Julien Marc-Henri

    Meeting abstracts of the Physical Society of Japan   68 ( 1 )   722 - 722   2013.3

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  • 29pXG-5 NMR study of impurity effect in Ba(Fe_<1-y>M_y)_2(As_<1-x>P_x)_2(M=Zn,Mn)

    Kawashima Y, Shimoda A, Iye T, Kitagawa S, Ishida K, Kasahara S, Shibauchi T, Matsuda Y, Terashima T

    Meeting abstracts of the Physical Society of Japan   68 ( 1 )   721 - 721   2013.3

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  • Electron irradiation of Co, Ni, and P-doped BaFe2As 2-type iron-based superconductors Reviewed

    Cornelis Jacominus Van Der Beek, Sultan Demirdiş, Dorothée Colson, Florence Rullier-Albenque, Yanina Fasano, Takasada Shibauchi, Yuji Matsuda, Shigeru Kasahara, Piotr Gierlowski, Marcin Konczykowski

    Journal of Physics: Conference Series   449 ( 1 )   2013

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    DOI: 10.1088/1742-6596/449/1/012023

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  • 磁場侵入長測定から見たLaFeAsO1-yの超伝導ギャップ構造のドーピング依存性

    蔵田聡信, 水上雄太, 川本雄太, 笠原成, 石角元志, 石角元志, 石田茂之, 鬼頭聖, 伊豫彰, 永崎洋, 社本真一, 芝内孝禎, 松田祐司

    日本物理学会講演概要集   68 ( 1 )   2013

  • <Research Report>Nematic Ordering observed in BaFe2(As1-xPx)2 Iron-based Superconductors

    笠原 成

    京都大学低温物質科学研究センター誌 : LTMセンター誌   ( 21 )   16 - 24   2012.12

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    Strongly interacting electrons can exhibit novel collective phases. Among them the electronic nematic phase is perhaps the most surprising as it is a unidirectional self-organized state that breaks the rotational symmetry of the underlying lattice. Here we provide evidence for the electronic nematic ordering in BaFe2(As1-xPx)2 — one of the cleanest iron-based superconductors, by highly sensitive in-plane torque magnetometry and complementary synchrotron X-ray diffraction measurements. Our results show that the nematicity develops well above the tetragonal-orthorhombic transition temperature (TS) and even persists to the nonmagnetic superconducting regime.

    DOI: 10.14989/173344

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  • 21aGA-7 Magnetic field effect on coexisting and competing state of magnetism and superconductivity in BaFe_2(As_<1-x>P_x)_2

    Iye T, Nakai Y, Kitagawa S, Ishida K, Kasahara S, Shibauchi T, Matsuda Y, Terashima T

    Meeting abstracts of the Physical Society of Japan   67 ( 2 )   581 - 581   2012.8

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  • 20pPSB-6 Impurity effect in the iron-based superconductor BaFe_2(As_<1-x>P_x)_2

    Kawashima Y, Shimoda A, Iye T, Kitagawa S, Ishida K, Kasahara S, Shibauchi T, Matsuda Y, Terashima T

    Meeting abstracts of the Physical Society of Japan   67 ( 2 )   558 - 558   2012.8

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  • 20pGA-9 Superconducting gap structure in optimally-doped single crystals LaFeAsO_<1-y> revealed by magnetic penetration depth measurements

    Mizukami Y, Kawamoto Y, Goh S. K, Kasahara S, Ishikado M, Ishida S, Kitou H, Iyo A, Eisaki H, Shamoto S, Terashima T, Shibauchi T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   67 ( 2 )   552 - 552   2012.8

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  • 20aGA-6 Pseudogap in BaFe_2(As, P)_2

    Sonobe T, Shimojima T, Shinada K, Ideta S, Malaeb Walid, Ishida Y, Shin S, Nakajima M, Tomioka Y, Kihou K, Lee C. H, Iyo A, Eisaki H, Ito T, Uchida S, Yoshida T, Fujimori A, Kasahara S, Terashima T, Shibauchi T, Matsuda Y, Ishizaka K

    Meeting abstracts of the Physical Society of Japan   67 ( 2 )   2012.8

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  • 18pGA-3 Study of the electronic nematic phase of URu_2Si_2 in the hidden ordered state

    Tonegawa S, Tsuruhara Y, Kasahara S, Okazaki R, Haga Y, Matsuda T, Yamamoto E, Onuki Y, Ikeda H, Shibauchi T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   67 ( 2 )   465 - 465   2012.8

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  • 20aGA-5 Orbital symmetry of band dispersions in BaFe_2(As\<1-x>P_x)_2

    Yoshida T, Ideta S, Nishi I, Suzuki H, Fujimori A, Shimojima T, Shinada K, Ishizaka K, Malaeb W, Shin S, Mo S. K, Shen Z. X, Hussain Z, Nakashima Y, Anzai H, Ino A, Arita M, Namatame H, Taniguchi M, Kumigashira H, Ono K, Kasahara S, Terashima T, Shibauchi T, Matsuda Y, Nakajima M, Uchida S, Tomioka Y, Ito T, Kihou K, Lee C. H, Iyo A, Eisaki H, Ikeda H, Arita R

    Meeting abstracts of the Physical Society of Japan   67 ( 2 )   501 - 501   2012.8

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  • 20aGA-4 Anisotropy of the superconducting gap of BaFe_2(As_<1-x>P_x)_2 (x = 0.38)

    Ideta S, Yoshida T, Nishi I, Suzuki H, Fujimori A, Shimojima T, Ishizaka K, Malaeb Walid, Shin S, Nakashima Y, Anzai H, Ino A, Arita M, Namatame H, Taniguchi M, Ono K, Kumigashira H, Kasahara S, Terashima T, Shibauchi T, Matsuda Y, Nakajima M, Uchida S, Tomioka Y, Ito T, Kihou K, Lee C. H, Iyo A, Eisaki H, Ikeda H, Arita R

    Meeting abstracts of the Physical Society of Japan   67 ( 2 )   2012.8

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  • 19aGA-7 Superconducting gap structure of (Ba_<1-x>K_x)Fe_2As_2 close to hole-doped end : penetration depth mesurements

    Kawamoto Y, Mizukami Y, Goh S. K, Kasahara S, Terashima T, Shibauchi T, Matsuda Y, Saito T, Fukazawa H, Kohori H, Kiho K, Iyo A, C. -H, Eisaki H

    Meeting abstracts of the Physical Society of Japan   67 ( 2 )   476 - 476   2012.8

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  • 19aGA-6 Superconducting gap structure of (Ba_<1-x>K_x)Fe_2As_2 close to hole-doped end : Thermal-transport measurement

    Watanabe D, Kasahara S, Shibauchi T, Matsuda Y, Saito T, Fukazawa H, Kohori Y, Kihou K, Iyo A, Lee C. -H, Eisaki H

    Meeting abstracts of the Physical Society of Japan   67 ( 2 )   475 - 475   2012.8

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  • 19aGA-4 Emergent Nematic Phase in an Iron-based Superconductor Ba(Fe_<1-x>Co_x)_2As_2

    Tsuruhara Y, Kasahara S, Tonegawa S, Mizukami Y, Watanabe D, Shi H. -J, Fukuda R, Sugimoto H, Nevidomskyy A. H, Terashima K, Shibauchi T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   67 ( 2 )   475 - 475   2012.8

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  • 24pYA-1 Effects of impurity scattering induced by electron irradiation in iron-based superconductors BaFe_2(As_<1-x>P_x)_2

    Mizukami Y, Hashimoto K, Kasahara S, Katsumata R, Goh S. K, van der Beek C. J, Konczykowski M, Terashima T, Shibauchi T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   67 ( 1 )   554 - 554   2012.3

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  • 27pYA-2 Anisotropy of the superconducting gap of BaFe_2(As_<1-x>P_x)_2

    Yoshida T, Ideta S, Nishi I, Suzuki H, Fujimori A, Shimojima T, Ishizaka K, Malaeb Walid, Shin S, Nakashima Y, Anzai H, Ino A, Arita M, Namatame H, Taniguchi M, Ono K, Kasahara S, Terashima T, Shibauchi T, Matsuda Y, Nakajima M, Uchida S, Tomioka Y, Ito T, Kihou K, Lee C. H, Iyo A, Eisaki H, Ikeda H, Arita R

    Meeting abstracts of the Physical Society of Japan   67 ( 1 )   695 - 695   2012.3

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    DOI: 10.1143/JPSJ.80.013710

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  • 25pYA-3 Coexistence and competition between magnetism and superconductivity in iron-based superconductors BaFe_2(As_<1-x>P_x)_2

    Iye T, Nakai Y, Kitagawa S, Ishida K, Kasahara S, Shibauchi T, Matsuda Y, Terashima T

    Meeting abstracts of the Physical Society of Japan   67 ( 1 )   633 - 633   2012.3

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  • 24pYA-12 Emergent Nemaic Phase in Iron-based Superconductors

    Kasahara S, Shi H.-J, Hashimoto K, Mizukami Y, Tonegawa S, Fukuda T, Sugimoto K, Nevidomskyy A. H, Terashima T, Shibauchi T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   67 ( 1 )   557 - 557   2012.3

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  • High-resolution thermal expansion of isovalently substituted BaFe2(As1-xPx)(2) Reviewed

    A. E. Boehmer, P. Burger, F. Hardy, T. Wolf, P. Schweiss, R. Fromknecht, H. von Loehneysen, C. Meingast, S. Kasahara, T. Terashima, T. Shibauchi, Y. Matsuda

    INTERNATIONAL CONFERENCE ON STRONGLY CORRELATED ELECTRON SYSTEMS (SCES 2011)   391 ( 1 )   2012

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  • P-concentration dependence of the quasiparticle density of states in BaFe2(As1-xPx)(2) Reviewed

    Tetsuya Iye, Yusuke Nakai, Shunsaku Kitagawa, Kenji Ishida, Hiroaki Ikeda, Shigeru Kasahara, Takasada Shibauchi, Yuji Matsuda, Takahito Terashima

    INTERNATIONAL CONFERENCE ON STRONGLY CORRELATED ELECTRON SYSTEMS (SCES 2011)   391 ( 1 )   2012

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  • LaFeAsO1-yの最適ドープ試料における磁場侵入長測定から見た超伝導ギャップ構造

    水上雄太, 川本雄太, GOH S. K., 笠原成, 石角元志, 石角元志, 石角元志, 石田茂之, 石田茂之, 鬼頭聖, 鬼頭聖, 伊豫彰, 伊豫彰, 永崎洋, 永崎洋, 社本真一, 社本真一, 寺嶋孝仁, 芝内孝禎, 松田祐司

    日本物理学会講演概要集   67 ( 2 )   2012

  • 24aGL-3 Fermi surfaces and the superconducting gap of BaFe_2(As_<1-x>P_x)_2

    Yoshida T, Ideta S, Nishi I, Suzuki H, Fujimori A, Shimojima T, Ishizaka K, Malaeb Walid, Shin S, Nakashima Y, Anzai H, Ino A, Arita M, Namatame H, Taniguchi M, Ono K, Kasahara S, Terashima T, Shibauchi T, Matsuda Y, Nakajima M, Uchida S, Tomioka Y, Ito T, Kihou K, Lee C. H, Iyo A, Eisaki H, Ikeda H, Arita R

    Meeting abstracts of the Physical Society of Japan   66 ( 2 )   643 - 643   2011.8

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  • 22pGM-10 The relationship between antiferromagnetism and superconductivity in iron-based superconductors BaFe_2(As_<1-x>P_x)_2

    Iye T, Nakai Y, Kitagawa S, Ishida K, Kasahara S, Shibauchi T, Matsuda Y, Terashima T

    Meeting abstracts of the Physical Society of Japan   66 ( 2 )   550 - 550   2011.8

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  • 22aGM-5 Rotational Symmetry Breaking in the Tetragonal Phase of Iron-based Superconductor BaFe_2(As_<1-x>P_x)_2

    Shi H. J, Kasahara S, Okazaki R, Yamashita M, Hashimoto K, Fukuda T, Sugimoto K, Shibauchi T, Terashima T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   66 ( 2 )   503 - 503   2011.8

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  • 21pGL-13 Electronic state and the superconductivity investigated in clean single crystals of LiFe(As.P)

    Kasahara S, Hashimoto K, Katsumata R, Coldea A. I, Carrington A, Shibauchi T, Matsuda Y, Terashima T

    Meeting abstracts of the Physical Society of Japan   66 ( 2 )   488 - 488   2011.8

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  • 21pGL-12 Superconducting gap structure in clean single crystals of LiFe(As,P) revealed by magnetic penetration depth measurements

    Hashimoto K, Katsumata R, Kasahara S, Yamashita M, Ikeda H, Terashima T, Shibauchi T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   66 ( 2 )   488 - 488   2011.8

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  • 24aGL-11 Doping Dependence of Superconducting Gap Structure and Quantum Criticality in Iron-based Superconductor BaFe_2(As,P)_2

    Matsuda Y, Hashimoto K, Katsumata R, Kasahara S, Watanabe D, Sensyu Y, Yamashita M, Ikeda H, Terashima T, Shibauchi T, Carrington A, Cho K, Prozorov R, Tanator M, Vekhter I, Vorontsov A. B

    Meeting abstracts of the Physical Society of Japan   66 ( 2 )   645 - 645   2011.8

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    DOI: 10.1016/j.physc.2011.05.016

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  • BaFe_2(As_<1-x>P_x)_2における3次元フェルミ面形状の組成変化(鉄系高温超伝導の物理,研究会報告)

    吉田 鉄平, 西 一郎, 出田 真一郎, 藤森 淳, 中島 正道, 内田 慎一, 笠原 成, 寺嶋 孝仁, 芝内 孝禎, 松田 祐司, 池田 浩章, 富岡 泰秀, 伊藤 利充, 木方 邦宏, 李 哲虎, 伊豫 彰, 永崎 洋, 久保田 正人, 小野 寛太, 有田 亮太郎

    物性研究   96 ( 5 )   552 - 552   2011.8

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    この論文は国立情報学研究所の電子図書館事業により電子化されました。

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  • ^<31>P-NMRによるBaFe_2(As_<1-x>P_x)_2の反強磁性と超伝導の研究(鉄系高温超伝導の物理,研究会報告)

    家 哲也, 中井 祐介, 北川 俊作, 石田 憲二, 芝内 孝禎, 松田 祐司, 笠原 成, 寺嶋 孝仁

    物性研究   96 ( 5 )   566 - 566   2011.8

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    この論文は国立情報学研究所の電子図書館事業により電子化されました。

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  • 26aEE-4 Composition dependence of band structure and Fermi surfaces in BaFe_2(As_<1-x>P_x)_2

    Nishi I, Ideta S, Yoshida T, Fujimori A, Kasahara S, Terashima T, Shibauchi T, Matsuda Y, Nakajima M, Uchida S, Tomioka Y, Ito T, Kihou K, Lee C, Iyo A, Eisaki H, Kubota M, Ono K, Ikeda H, Arita R

    Meeting abstracts of the Physical Society of Japan   66 ( 1 )   2011.3

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  • 26aEE-2 Rotational Symmetry Breaking in the Tetragonal Phase of Iron-based Superconductor BaFe_2(As_<1-x>P_x)_2

    Shi H.J, Kasahara S, Okazaki R, Yamashita M, Shibauchi T, Terashima T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   66 ( 1 )   587 - 587   2011.3

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  • 26aEE-1 Quasiparticle Excitation in Isovalently doped Iron-based Superconductors Investigated by Magnetic Penetration Depth Measurements

    Hashimoto K, Katsumata R, Kasahara S, Terashima T, Cho K, Tanator M.A, Prozorov R, Carrington A, Shibauchi T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   66 ( 1 )   587 - 587   2011.3

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  • 28aEE-11 NMR study on magnetism and superconductivity in iron-based superconductors BaFe_2(As_<1-x>P_x)_2

    Iye T, Nakai Y, Kitagawa S, Ishida K, Kasahara S, Shibauchi T, Matsuda Y, Terashima T

    Meeting abstracts of the Physical Society of Japan   66 ( 1 )   667 - 667   2011.3

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  • 28aEE-4 NMR/NQR study on CaFe_2(As_<1-x>P_x)_2

    Nakai Y, Maegawa H, Kitagawa S, Iye T, Ishida K, Kasahara S, Shibauchi T, Matsuda Y, Terashima T

    Meeting abstracts of the Physical Society of Japan   66 ( 1 )   665 - 665   2011.3

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  • 26pEJ-2 Controlling the ground state of 111 Fe-pnictides via chemical pressure

    Kasahara S, Hashimoto K, Katsumata R, Shibauchi T, Matsuda Y, Terashima T

    Meeting abstracts of the Physical Society of Japan   66 ( 1 )   612 - 612   2011.3

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  • 26aEE-5 Observation of the superconducting gap in BaFe_2(As_<1-x>P_x)_2

    Yoshida T, Nishi I, Ideta S, Fujimori A, Kasahara S, Terashima T, Shibauchi T, Matsuda Y, Nakajima M, Uchida S, Tomioka Y, Ito T, Kihou K, Lee C.H, Iyo A, Eisaki H, Kubota M, Ono K, Ikeda H, Arita R

    Meeting abstracts of the Physical Society of Japan   66 ( 1 )   588 - 588   2011.3

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  • BaFe2(As1-xPx)2の3次元フェルミ面の観測

    吉田鉄平, 吉田鉄平, 西一郎, 出田真一郎, 藤森淳, 藤森淳, 笠原成, 寺嶋孝仁, 芝内孝禎, 松田祐司, 久保田正人, 小野寛太, 池田浩章, 有田亮太郎, 有田亮太郎

    日本放射光学会年会・放射光科学合同シンポジウム予稿集   24th   2011

  • BaFe2(As1-xPx)2の超伝導ギャップの観測

    吉田鉄平, 吉田鉄平, 西一郎, 出田真一郎, 藤森淳, 藤森淳, 笠原成, 寺嶋孝仁, 芝内孝禎, 松田祐司, 中島正道, 内田慎一, 内田慎一, 富岡泰秀, 富岡泰秀, 伊藤利充, 伊藤利充, 木方邦宏, 木方邦宏, LEE C. H., LEE C. H., 伊豫彰, 伊豫彰, 永崎洋, 永崎洋, 久保田正人, 小野寛太, 池田浩章, 有田亮太郎, 有田亮太郎

    日本物理学会講演概要集   66 ( 1 )   2011

  • BaFe2(As1-xPx)2のバンド構造とフェルミ面の組成依存性

    西一郎, 出田真一郎, 吉田鉄平, 吉田鉄平, 藤森淳, 藤森淳, 笠原成, 寺嶋孝仁, 芝内孝禎, 松田祐司, 中島正道, 内田慎一, 内田慎一, 富岡泰秀, 富岡泰秀, 伊藤利充, 伊藤利充, 木方邦宏, 木方邦宏, 李哲虎, 李哲虎, 伊豫彰, 伊豫彰, 永崎洋, 永崎洋, 久保田正人, 小野寛太, 池田浩章, 池田浩章, 有田亮太郎, 有田亮太郎

    PFシンポジウム要旨集   28th   2011

  • 23aWH-3 Three-dimensional structure of the Fermi surfaces in BaFe_2(As_<1-x>P_x)_2

    Yoshida T, Nishi I, Ideta S, Fujimori A, Kasahara S, Terashima T, Shibauchi T, Matsuda Y, Kubota M, Ono K, Ikeda H, Arita R

    Meeting abstracts of the Physical Society of Japan   65 ( 2 )   452 - 452   2010.8

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  • 24pWH-13 NMR study on iron-based superconductors BaFe_2(As_<1-x>P_x)_2 in P underdoped region

    Iye T, Nakai Y, Kitagawa S, Ishida K, Kasahara S, Shibauchi T, Matsuda Y, Terashima T

    Meeting abstracts of the Physical Society of Japan   65 ( 2 )   572 - 572   2010.8

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  • 24pWH-12 NMR studies on BaFe_2(As_<1-x>P_x)_2(x>0.3)

    Nakai Y, Goh S. K, Iye T, Kitagawa S, Ihara Y, Ishida K, Kasahara S, Shibauchi T, Matsuda Y, Terashima T

    Meeting abstracts of the Physical Society of Japan   65 ( 2 )   571 - 571   2010.8

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  • 23pWH-12 Tetragnal to collapsed tetragonal structural transition and superconductivity investigated in single crystals of CaFe_2(As,P)_2

    Kasahara S, Nakai Y, Hashimoto K, Ishida K, Shibauchi T, Terashima T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   65 ( 2 )   503 - 503   2010.8

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  • 23aPS-70 Physical properties of LiFe(As,Pn) single crystals

    Kasahara S, Hashimoto K, Katsumata R, Tonegawa S, Shibauchi T, Matsuda Y, Terashima T

    Meeting abstracts of the Physical Society of Japan   65 ( 2 )   476 - 476   2010.8

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  • 25aWH-8 Doping dependence of superconducting gap structure in single crystals of BaFe_2(As_<1-x>P_x)_2 via penetration depth measurement

    Katsumata R, Hashimoto K, Boehmer A, Tonegawa S, Kasahara S, Yamashita Y, Terashima T, Serafin A, Carrington A, Shibauchi T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   65 ( 2 )   582 - 582   2010.8

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  • 25pWB-14 低温還元反応による還元アナターゼTiO_2薄膜の電子物性制御(25pWB Ru酸化物・Ti酸化物,領域8(強相関系:高温超伝導,強相関f電子系など))

    北田 敦, 笠原 成, 寺嶋 孝仁, 小林 洋治, 吉村 一良, 陰山 洋

    日本物理学会講演概要集   65 ( 2 )   599 - 599   2010.8

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  • 23pGH-9 Impurity Effects of Ba(Fe_<0.925>Co_<0.075>)_2As_2 Single Crystals

    Tonegawa S, Kasahara S, Hashimoto K, Katsumata R, Yamashita M, Terashima T, Shibauchi T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   65 ( 1 )   687 - 687   2010.3

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  • 22pGH-10 NMR study on iron-based superconductors BaFe_2(As_<1-x>P_x)_2 (II)

    Iye T, Nakai Y, Kitagawa S, Ishida K, Kasahara S, Shibauchi T, Matsuda Y, Terashima T

    Meeting abstracts of the Physical Society of Japan   65 ( 1 )   661 - 661   2010.3

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  • 22pGH-9 NMR studies on BaFe_2(As_<1-x>P_x)_2 (I)

    Nakai Y, Iye T, Kitagawa S, Ishida K, Kasahara S, Shibauchi T, Matsuda Y, Terashima T

    Meeting abstracts of the Physical Society of Japan   65 ( 1 )   661 - 661   2010.3

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  • 20pGH-5 Laser angle-resolved photoemission study on BaFe_2(As_<0.67>P_<0.33>)_2 : Observation of Fermi surface and Superconducting gap II

    Sakaguchi F, Shimojima T, Ishizaka K, Ishida Y, Okawa M, Kiss T, Togashi T, Wang X. -Y, Chen C. T, Watanabe S, Kasahara S, Shibauchi T, Matsuda Y, Takeya H, Hirata K, Terashima T, Shin S

    Meeting abstracts of the Physical Society of Japan   65 ( 1 )   563 - 563   2010.3

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  • 20aGH-10 Charge transport properties in AEFe_2(As,P)_2 single crystals

    Kasahara S, Hashimoto K, Tonegawa S, Katsumata R, Nakai Y, Ishida K, Shibauchi T, Terashima T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   65 ( 1 )   536 - 536   2010.3

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  • 23pGH-10 Study of superconducting gap structure in single crystals of AEFe_2(As_<1-x>P_x)_2

    Katsumata R, Hashimoto K, Tonegawa S, Kasahara S, Ikada K, Yamashita Y, Nakai Y, Ishida K, Terashima T, Shibauchi T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   65 ( 1 )   687 - 687   2010.3

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  • 20pGH-9 Evolution of Fermi surface in BaFe2(As1-xPx)2 revealed by the dHvA effects

    Shishido H., Bangura A. F., Coldea A. I., Hashimoto K., Kasahara S., Rourke P. M. C., Ikeda H., Terashima T., Tonegawa S., Settai R., Onuki Y., Vignolles D., Proust C., Vignolle B., McCollam A., Shibauchi T., Matsuda Y., Carrington A.

    Meeting abstracts of the Physical Society of Japan   65 ( 1 )   564 - 564   2010.3

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  • BaFe2(As1-xPx)2におけるフェルミ面の3次元構造

    吉田鉄平, 吉田鉄平, 西一郎, 出田真一郎, 藤森淳, 藤森淳, 笠原成, 寺嶋孝仁, 芝内孝禎, 松田祐司, 久保田正人, 小野寛太, 池田浩章, 有田亮太郎, 有田亮太郎

    日本物理学会講演概要集   65 ( 2 )   2010

  • 25pRL-5 Laser angle-resolved photoemission study on BaFe_2(As_<0.67>P_<0.33)_2 : Observation of Fermi surface and Superconducting gap

    Sakaguchi F, Shimojima T, Ishizaka K, Ishida Y, Okawa M, Kiss T, Togashi T, Wang X. -Y, Chen C. T, Watanabe S, Kasahara S, Shibauchi T, Matsuda Y, Takeya H, Hirata K, Terashima T, Shin S

    Meeting abstracts of the Physical Society of Japan   64 ( 2 )   457 - 457   2009.8

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  • 25aRH-3 Superconducting gap structure studied by thermal conductivity measurements of BaFe_2(As<1-x>P_x)_2

    Senshu Y, Yamashita M, Nakata N, Kasahara S, Terashima T, Takeya H, Hirata K, Shibauchi T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   64 ( 2 )   405 - 405   2009.8

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  • 25aRH-2 Determination of superconducting gap symmetry in single crystals of iron-arsenide superconductor BaFe_2(As_<1-x>P_x)_2 from the penetration depth measurements

    Hashimoto K, Tonegawa S, Ikada K, Serafin Alenssandro, Carrington Antony, Kasahara S, Terashima T, Takeya H, Hirata K, Ikeda H, Shibauchi T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   64 ( 2 )   405 - 405   2009.8

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  • 28pRH-4 Superconductivity in BaFe_2(As_<1-x>P_x)_2 single crystal : Electronic transport properties

    Kasahara S, Hashimoto K, Yamashita M, Shishido H, Okazaki R, Tonegawa S, Senchu Y, Ikada K, Takeya h, Hirata K, Ikeda H, Shibauchi T, Terashima T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   64 ( 2 )   568 - 568   2009.8

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  • 27pRH-11 ^<31>P and ^<75>As-NMR studies on iron-based superconductors BaFe_2(As_<1-x>P_x)_2

    Iye T, Kitagawa S, Nakai Y, Ishida K, Kasahara S, Shibauchi T, Matsuda Y, Terashima T

    Meeting abstracts of the Physical Society of Japan   64 ( 2 )   546 - 546   2009.8

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  • 27aRH-9 PLD Growth of Fe-based superconducting films and investigations on the superconducting properties

    Kasahara S, Kato T, Takeya H, Hirata K, Shibauchi T, Matsuda Y, Terashima T

    Meeting abstracts of the Physical Society of Japan   64 ( 2 )   532 - 532   2009.8

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  • 27pTC-4 Microwave penetration depth measurements on iron-arsenide high-temperature superconductors : Evidence for a full-gap superconductor

    Hashimoto K, Shibauchi T, Kato T, Ikada K, Tonegawa S, Okazaki R, Shishido H, Ishikado M, Kito H, Iyo A, Eisaki H, Shamoto S, Kasahara S, Takeya H, Hirata K, van der Beek C. J, Konczykowski M, Terashima T, Matsuda Y

    Meeting abstracts of the Physical Society of Japan   64 ( 1 )   555 - 555   2009.3

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    DOI: 10.1103/PhysRevLett.102.017002

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  • 28aPS-15 Crystal Growth of Sr(K)Fe_2As_2 Superconductors

    Takeya H., Kasahara S., Hirata K.

    Meeting abstracts of the Physical Society of Japan   64 ( 1 )   599 - 599   2009.3

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  • Superconducting Properties of Noncentrosymmetric Li(2)(Pt(1-x)Pd(x))(3)B Superconductors Reviewed

    H. Takeya, S. Kasahara, M. ElMassalami, K. Hirata, K. Togano

    INTERNATIONAL CONFERENCE ON SUPERCONDUCTIVITY AND MAGNETISM (ICSM)   153   2009

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  • 21aPS-122 Substitution Effect and Physical Properties of Li_2(Pd/Pt)_3B Superconductors

    Takeya H., Kasahara S., Massalami M. El., Hirata K., Togano K.

    Meeting abstracts of the Physical Society of Japan   63 ( 2 )   521 - 521   2008.8

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  • 21aPS-72 Antiferromagnetism in the Ce-based U_3Ni_4Si_4-type compounds and serch for the quantum critical pointe

    Kasahara S, Fujii H, Mochiku T, Takeya H, Hirata K

    Meeting abstracts of the Physical Society of Japan   63 ( 2 )   509 - 509   2008.8

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  • 24aPS-93 Sample Characterization and Physical Properties of Li_2(Pd,Pt)_3B Superconductor

    Takeya H., Kasahara S., Massalami M.El., Hirata K., Togano K.

    Meeting abstracts of the Physical Society of Japan   63 ( 1 )   592 - 592   2008.2

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  • 23pPSB-25 Superconductivity in tie compounds of U_3Ni_4Si_4-type structure

    Kasahara S, Fujii H, Mochiku T, Takeya H, Hirata K

    Meeting abstracts of the Physical Society of Japan   63 ( 1 )   551 - 551   2008.2

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  • 21aPS-130 Specific Heat of Noncentrosymmetrical Superconductor, Li_2(Pt_xPd_<1-x>)_3B

    Takeya H., Kasahara S., Massalami M.El., Hirata K., Mochiku T., Togano K.

    Meeting abstracts of the Physical Society of Japan   62 ( 2 )   547 - 547   2007.8

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  • 22pWH-13 Low temperature specific teat of novel superconductors La_3M_4X_4 (M=Ni, Pd; X=Ge, Si) with TiCr_2Si_2-AlB_2 layered structure

    Kasahara S, Fujii H, Mochiku T, Takeya H, Hirata K

    Meeting abstracts of the Physical Society of Japan   62 ( 2 )   609 - 609   2007.8

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  • 19aPS-121 Specific Heat and Physical Properties of Li_2(Pd,Pt)_3B Superconductor

    Takeya H., Kasahara S., Massalami M.EI., Hirata K., Mochiku T., Togano K.

    Meeting abstracts of the Physical Society of Japan   62 ( 1 )   584 - 584   2007.2

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  • 19aPS-107 Superconductivity in La_3Ni_4X_4(X=Si,Ge)

    Fujii Hiroki, Kasahara Shigeru

    Meeting abstracts of the Physical Society of Japan   62 ( 1 )   581 - 581   2007.2

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  • 18pWF-3 Superconductivity and the thermal properties of La_3Pd_4Ge_4

    Kasahara S, Fujii H, Mochiku T, Takeya H, Hirata K

    Meeting abstracts of the Physical Society of Japan   62 ( 1 )   499 - 499   2007.2

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  • 25aYA-9 Positive local magnetization in PrOs_4Sb_<12>

    Kasahara S, Hirata K, Tamegai T, Sugawara H, Kikuchi D, Sato H

    Meeting abstracts of the Physical Society of Japan   61 ( 2 )   484 - 484   2006.8

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  • 30pXC-4 Superconducting Properties of Pb Nanowires

    Ishii S, Ooi S, Kasahara S, Ochiai Y, Hirata K

    Meeting abstracts of the Physical Society of Japan   61 ( 1 )   708 - 708   2006.3

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  • 28aUF-5 Local magnetization measurements in PrOs_4Sb_<12> using micro-Hall probe array

    Kasahara S, Hirata K, Tamegai T, Sugawara H, Kikuchi D, Sato H

    Meeting abstracts of the Physical Society of Japan   61 ( 1 )   577 - 577   2006.3

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  • [ポスター19]時間反転対称性の破れた超伝導体における局所磁化異常と超伝導ドメイン:PrOs_4Sb_<12>(異方的超伝導現象の統一的理解を目指して,京都大学基礎物理学研究所 研究会,研究会報告)

    笠原 成

    物性研究   86 ( 2 )   250 - 250   2006

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    Other Link: http://hdl.handle.net/2433/110445

  • Local field measurements in PrOs4Sb12 with broken time-reversal symmetry Reviewed

    Shigeru Kasahara, Tsuyoshi Tamegai, Hitoshi Sugawara, Hideyuki Sato

    AIP Conference Proceedings   850   651 - 652   2006

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    DOI: 10.1063/1.2354878

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  • 19aYG-7 Local magnetization anomalies in PrOs_4Sb_<12> and its space distribution

    Kasahara S, Hirata K, Tamegai T, Sugawara H, Kikuchi D, Sato H

    Meeting abstracts of the Physical Society of Japan   60 ( 2 )   362 - 362   2005.8

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  • 22pPSA-80 Electrical conduction properties of multi-walled carbon nanotubes synthesized by metal organic chemical vapor deposition

    Sadki E. H, Kasahara S, Ishi S, Ooi S, Takeya H, Hirata K

    Meeting abstracts of the Physical Society of Japan   60 ( 2 )   558 - 558   2005.8

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  • 25pTA-4 Examination of chiral superconductivity in PrOs_4Sb_<12> by local field measurements

    Kasahara S, Tokunaga Y, Tokunaga M, Tamegai T, Sugawara H, Sato H

    Meeting abstracts of the Physical Society of Japan   60 ( 1 )   549 - 549   2005.3

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  • 12aRA-6 Peculiar superconductivity in PrOs_4Sb_<12> probed by local magnetization

    Kasahara S, Tokunaga Y, Tokunaga M, Tamegai T, Sugawara H, Sato H

    Meeting abstracts of the Physical Society of Japan   59 ( 2 )   415 - 415   2004.8

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  • 30aXB-8 Vortex states and inhomogeneous magnetic inductions in Bi_2Sr_2CaCu_2O_<8+y> under tilted fields

    Kasahara S, Tokunaga Y, Tokunaga M, Tamegai T

    Meeting abstracts of the Physical Society of Japan   59 ( 1 )   637 - 637   2004.3

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  • 27aWL-4 Detection of Vortices in Organic Superconductor κ-(BEDT-TTF)_2Cu(NCS)_2 using Hall Sensors II

    Caneko H, Noguchi Y, Kasahara S, Tamegai T, Nishio Y, Kajita K

    Meeting abstracts of the Physical Society of Japan   59 ( 1 )   824 - 824   2004.3

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  • Detection of Vortices in Organic Superconductor κ-(BEDT-TTF)_2Cu(NCS)_2 using Hall Sensors

    Caneko H, Kasahara S, Tamegai T, Nishio Y, Kajita K

    Meeting abstracts of the Physical Society of Japan   58 ( 2 )   730 - 730   2003.8

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  • Doping dependence of vortex state in Bi_2Sr_2CaCu_2O_<8+y> under tilted fields

    Kasahara Shigeru, Tokunaga Masashi, Tamegai Tsuyoshi

    Meeting abstracts of the Physical Society of Japan   58 ( 2 )   556 - 556   2003.8

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  • Magnetic measurement in the Vortex State of κ-(BEDT-TTF)_2X

    Kasahara S, Caneko H, Nishio Y, Kajita K

    Meeting abstracts of the Physical Society of Japan   58 ( 1 )   811 - 811   2003.3

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  • Anomlous Response in the Vortex State of κ-type Organic Superconductors

    Kasahara S, Caneko H, Nishio Y, Kajita K

    Meeting abstracts of the Physical Society of Japan   57 ( 2 )   710 - 710   2002.8

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  • 26pXM-10 Flux-liow Resistance Oscillation in an Organic Superconductor κ-(BEDT-TTF)_2Cu(NCS)_2

    Kasahara S, Tateishi F, Kaneko H, Hara T, Nishio Y, Kajita K

    Meeting abstracts of the Physical Society of Japan   57 ( 1 )   795 - 795   2002.3

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  • 26pXM-11 Flux-flow Resistance Oscillation in Organic Superconductor κ-(BEDT-TTF)_2Cu(NCS)_2II

    Tateishi F, Kasahara S, Kaneko H, Hara T, Nishio Y, Kajita K

    Meeting abstracts of the Physical Society of Japan   57 ( 1 )   795 - 795   2002.3

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  • Anomalous Response of Vortices State in Organic Superconductor κ-(BEDT-TTF)_2X

    Kasahara S, Tateishi F, Kaneko H, Hara T, Nishio Y, Kajita K

    Meeting abstracts of the Physical Society of Japan   56 ( 2 )   702 - 702   2001.9

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  • Behavior of Vortices in an Organic Superconductor κ-(BEDT-TTF)_2X

    Kasahara S, Takaya D, Nishio Y, Kajita K

    Meeting abstracts of the Physical Society of Japan   56 ( 1 )   752 - 752   2001.3

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  • Behavior of Vortices in an Organic Superconductor κ-(BEDT-TTF)_2Cu(NCS)_2

    Kasahara S, Takaya D, Nishio Y, Kajita K

    Meeting abstracts of the Physical Society of Japan   55 ( 2 )   716 - 716   2000.9

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  • AC-Magnetic Response of Vortex State in an Organic Superconductor κ-(BEDT-TTF)_2Cu(NCS)_2

    Kasahara S, Tamura M, Nishio Y, Kajita K

    Meeting abstracts of the Physical Society of Japan   55 ( 1 )   729 - 729   2000.3

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  • 25pE-5 AC-Magnetic Response of Vortex State in an Organic Superconductor κ-(BEDT-TTF)_2Cu(NCS)_2

    Kasahara S, Tamura M, Nishi Y, Kajita K

    Meeting abstracts of the Physical Society of Japan   54 ( 2 )   746 - 746   1999.9

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  • 29a-XB-10 AC-Magnetic Response of Vortex State in an Organic Superconductor k-(BEDT-TTF)_2Cu(NCS)_2

    Kasahara S, Ohtsuka T, Ichikawa T, Nishio Y, Kajita K

    Meeting abstracts of the Physical Society of Japan   54 ( 1 )   254 - 254   1999.3

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  • Vortex State in an Organic Superconductor κ-(BEDT-TTF)_2Cu(NCS)_2

    KASAHARA S, OHTSUKA T, TAMURA M, NISHIO Y, KIJITA K

    Meeting abstracts of the Physical Society of Japan   53 ( 2 )   317 - 317   1998.9

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  • Motion of Vortex in an Organic Superconductor κ-(BEDT-TTF)_2Cu(NCS)_2

    KASAHARA S, ICHIKAWA T, TAMURA M, NISHIO Y, KJITA K

    Meeting abstracts of the Physical Society of Japan   53 ( 1 )   260 - 260   1998.3

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  • 8a-C-1 Motion of Vortices in an Organic Superconductor κ-(BEDT-TTF)_2Cu(NCS)_2

    ichikawa T, kasahara S, tamura M, nishio Y, kajita K

    Meeting abstracts of the Physical Society of Japan   52 ( 2 )   298 - 298   1997.9

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Presentations

  • Multiple Superconducting Phases in Tetragonal FeSe1-xSx Invited

    Opto-X-Nano2024 

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    Event date: 2024.11.27 - 2024.11.29

    Language:English   Presentation type:Oral presentation (invited, special)  

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  • Multiple Superconducting Phases in Tetragonal FeSe1-xSx

    Novel Superconductors 2024: Materials, properties, applications and perspectives 

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    Event date: 2024.10.7 - 2024.10.11

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  • Exotic Superconductivity and High-Field Phase Diagrams of FeSe1-xSx Invited

    The 3rd conference on Physics under Synergetic Extreme Conditions (SECUF-2024) 

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    Event date: 2024.7.19 - 2024.7.22

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  • Exotic superconducting state and high-field phase diagram of tetragonal FeSe1-xSx Invited

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    Event date: 2024.6.11 - 2024.6.13

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  • Growth of anisotropic SC gap in tetragonal FeSe1-xSx with Bogoliubov Fermi surface

    S. Kasahara, Y. Kitanishi, K. Tanaka, M. Ohno, H. Fujii, S. Kiyama, T. Kihara

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    Event date: 2024.3.18 - 2024.3.21

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  • Non-mean-field-like gap formation in the ultra-nodal pairing state of tetragonal FeSe1-xSx

    APS March meeting 2024 

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    Event date: 2024.3.4 - 2024.3.8

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  • Superconducting gap structure of tetragonal FeSe1-xSx under high pressures Invited

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    Event date: 2023.11.28 - 2023.11.30

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  • Exotic superconducting state of FeSe1-xSx Invited

    研究会「強相関電子系のフロンティア」 

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    Event date: 2023.8.21 - 2023.8.22

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

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  • Fulde-Ferrell-Larkin-Ovchinnikov States in the BCS-BEC-Crossover Superconductor FeSe Invited

    SHIGERU KASAHARA

    13th International Conference on Materials and Mechanisms of Superconductivity & High Temperature Superconductors (M2S-2022)  2022.7.18 

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    Event date: 2022.7.17 - 2022.7.22

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  • FeSeにおけるFFLO超伝導相 Invited

    笠原成

    日本物理学会 2021年秋季大会 

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    Event date: 2021.9.20 - 2021.9.23

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

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  • Fulde-Ferrell-Larkin-Ovchinnikov States in the BCS-BEC-Crossover Superconductor FeSe Invited

    S. Kasahara

    18th International Vortex Conference 2021 (Vortex 2021) 

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    Event date: 2021.5.24 - 2021.6.4

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  • FeSeにおけるBCS-BECクロスオーバーとFFLO超伝導 Invited

    笠原成

    つくば-柏-本郷 超伝導かけはしプロジェクト ワークショップ(4)「超伝導物質、トポロジカル物質」 

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    Event date: 2021.3.25 - 2021.3.26

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  • Evidence for FFLO superconducting states in the BCS-BEC crossover superconductor FeSe Invited

    American Physical Society (APS) March Meeting 2021 

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    Event date: 2021.3.15 - 2021.3.19

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  • イリジウム酸化物Sr2Ir1-xRhxO4におけるアナポール秩序と鉄系超伝導体FeSeにおけるFFLO状態 Invited

    笠原成

    第14回 物性科学領域横断研究会 凝縮系科学の最前線 

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    Event date: 2020.12.4 - 2020.12.5

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  • FFLO superconducting phases of FeSe studied in high-magnetic fields Invited

    S. Kasahara

    ARHMF & KINKEN Materials Science School 2020 for Young Scientists 

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    Event date: 2020.12.1 - 2020.12.3

    Language:English   Presentation type:Oral presentation (invited, special)  

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  • 超シャロウバンド構造を有する鉄系超伝導体が示す新奇量子凝縮状態 Invited

    笠原成

    東京大学物性研究所 ISSPワークショップ「量子物質研究の最近の進展と今後の展望」 

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    Event date: 2020.9.24 - 2020.9.28

    Presentation type:Oral presentation (invited, special)  

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  • 強磁場熱輸送測定によるFeSeのab面内磁場下におけるFFLO超伝導の観測

    笠原成, 佐藤雄貴, S. Licciardello, M. Čulo, S. Arsenijević, T. Ottenbros, 冨永貴弘, J.Böker, I. Eremin, 芝内孝禎, J. Wosnitza, N. E. Hussey, 松田祐司

    日本物理学会2020年秋季大会 

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    Event date: 2020.9.8 - 2020.9.11

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  • FeSeの強磁場熱輸送測定:FFLO状態

    笠原成, 佐藤雄貴, S. LicciardelloB, M. Čulo, S. Arsenijević, T. Ottenbros, 冨永貴弘, J.Böker, I. Eremin, 芝内孝禎, J. Wosnitza, N. E. Hussey, 松田祐司

    日本物理学会2020年年次大会 

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    Event date: 2020.3.16 - 2020.3.19

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  • High-field superconducting phase of FeSe under c-axis magnetic field

    Suzuki H., Sato Y., Murayama H., Kasahara S., Kasahara Y., Hanaguri T., Machida T., Shibauchi T., Matsuda Y.

    Meeting Abstracts of the Physical Society of Japan  2020  The Physical Society of Japan

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    Event date: 2020

    Language:Japanese  

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  • FeSeにおけるFFLO超伝導 Invited

    笠原成

    第27回渦糸物理ワークショップ 

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    Event date: 2019.12.17 - 2019.12.19

    Presentation type:Oral presentation (invited, special)  

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  • Nematic Phase Transition at the Onset of Pseudogap in Cuprates Invited

    S. Kasahara

    Materials Research Meeting (MRM2019) 

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    Event date: 2019.12.10 - 2019.12.14

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  • FeSeにおける強磁場超伝導相:FFLO状態 Invited

    笠原成

    京都大学基礎物理学研究所研究会 「電子相関が生み出す超伝導現象の未解決問題と新しい潮流」 

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    Event date: 2019.10.28 - 2019.10.30

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  • Spectroscopic-imaging study on the magnetic-field induced superconducting-superconducting transition in FeSe

    Hanaguri T., Machida T., Kasahara S., Shibauchi T., Matsuda Y.

    Meeting Abstracts of the Physical Society of Japan  2019  The Physical Society of Japan

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    Event date: 2019

    Language:Japanese  

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  • STM measurement on electric structure in tetragonal phase of Fe(Se,S)

    Sano D., Suematsu T., Naritsuka M., Haze M., Taniguchi T., Kasahara S., Kasahara Y., Shibauchi T., Hanaguri T., Matsuda Y.

    Meeting Abstracts of the Physical Society of Japan  2019  The Physical Society of Japan

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    Event date: 2019

    Language:Japanese  

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  • 77Se NMR study near the magnetic orderded state on FeSe1-xSx(x = 0.12) under high pressure

    Kuwayama T., Matsuura K., Mizugami Y., Kasahara S., Matsuda Y., Shibauchi T., Uwatoko Y., Fujiwara N.

    Meeting Abstracts of the Physical Society of Japan  2018  The Physical Society of Japan

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    Event date: 2018

    Language:Japanese  

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  • Nematic Phase Transition at the Onset of Pseudogap in Cuprates Invited International conference

    Shigeru Kasahara

    Plasma 2019 Workshop  2019.1.18 

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  • Nematic transition at the onset of pseudogap in cuprates Invited International conference

    Shigeru Kasahara

    12th International Conference on Ceramic Materials and Components for Energy and Environmental Applications (CMCEE 2018)  2018.7.25 

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  • Nematic transition at the onset of pseudogap in cuprates Invited International conference

    Shigeru Kasahara

    International Workshop on Recent Progress in Superconductivity (IWRS 2018), Jul. 8-12, (2018)  2018.7.9 

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  • 銅酸化物高温超伝導体の擬ギャップ状態における新奇なネマティシティ Invited

    笠原 成

    京都大学基礎物理学研究所研究会「電子相関が生み出す新規な秩序と超伝導現象: トポロジー、液晶状態、動的現象」  2018.5.8 

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  • Nematic transition at the onset of pseudogap in cuprates Invited International conference

    Shigeru Kasahara

    The 30th International Symposium on Superconductivity (ISS2017)  2017.12.15 

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  • ネマティック秩序と非従来型超伝導 Invited

    笠原 成

    京都大学基礎物理学研究所研究会「超伝導研究の最先端: 多自由度、非平衡、電子相関、トポロジー、人工制御」  2017.6 

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  • Quasiparticle excitations of FeSe in the BCS-BEC crossover Invited International conference

    Shigeru Kasahara

    The 16th International Workshop on Vortex Matter in Superconductors (VORTEX2017)  2017.5.28 

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  • ネマティック転移を伴う擬ギャップ相 Invited

    笠原 成

    日本物理学会2017年年次大会  2017.3.17 

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  • BCS-BEC crossover in FeSe with small Fermi energies Invited International conference

    Shigeru Kasahara

    American Physical Society (APS) March Meeting  2017.3.13 

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  • Quasiparticle excitations of FeSe in the BCS-BEC crossover Invited International conference

    Shigeru Kasahara

    CEMS-QPEC Topical Meeting on Superconductivity under Extreme Conditions,  2017.1.17 

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  • Probing highly spin-polarized superconducting state of FeSe in the BCS-BEC crossover Invited International conference

    Shigeru Kasahara

    FFLO-Phase in Quantum Liquids, Quantum Gases, and Nuclear Matter (FFLO16)  2016.7.20 

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  • “BCS-BECクロスオーバー” 領域8シンポジウム “FeSeのエキゾチック超伝導” Invited

    笠原 成

    日本物理学会2016年年次大会  2016.3.19 

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  • Electronic structure and physics of the BCS-BEC cross-over in FeSe Invited International conference

    Shigeru Kasahara

    Seminar at The Dresden High Magnetic Field Laboratory (Hochfeld-Magnetlabor Dresden, HLD), Helmholtz-Zentrum Dresden-Rossendorf, Germany  2016.1.27 

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  • Electronic structure and giant superconducting fluctuations in FeSe Invited International conference

    Shigeru Kasahara

    Workshop on the two-dimensional chalcogenides: exotic electronic orders, superconductivity and magnetism, IFW Dresden, Germany  2015.8.31 

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  • Fermi surface in FeSe: Quantum oscillation measurements International conference

    Shigeru Kasahara

    Materials & Mechanisms of Superconductivity (M2S) 2015, Geneva, Switzerland.  2015.8.23 

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  • Electronic structure and the physics of the BCS-BEC crossover in FeSe Invited International conference

    Shigeru Kasahara

    Energy Materials Nanotechnology (EMN) Workshop on Iron and Iridium based Superconductivity, Qingdao, China.  2015.6.14 

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  • Preformed pairing in superconducting FeSe in the BCS-BEC cross-over regime International conference

    Shigeru Kasahara

    American Physical Society (APS), March Meeting 2015, San Antonio, TX, USA.  2015.3.21 

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  • FeSe におけるBCS-BEC クロスオーバー領域の超伝導 Invited

    笠原 成

    京都大学基礎物理学研究所研究会「多自由度電子状態と電子相関が生み出す新奇超伝導の物理」  2014.10.21 

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    Language:Japanese   Presentation type:Oral presentation (invited, special)  

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  • Superconductivity in FeSe with Extremely Small Fermi Energy Invited International conference

    Shigeru Kasahara

    Energy Materials Nanotechnology (EMN) Workshop on Iron and Iridium based Superconductivity, Cancun, Mexico.  2014.7.9 

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  • 鉄系超伝導体における量子臨界現象とネマティック電子状態 Invited

    笠原 成

    日本物理学会2014年年次大会  2014.3.27 

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  • Nodal superconducting state in clean single crystals of FeSe International conference

    Shigeru Kasahara

    American Physical Society (APS), March Meeting 2014, Denver, Colorado, USA.  2014.3.3 

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  • Quantum criticality and nematic electronic state in an iron-based superconductor BaFe2(As1-xPx)2 Invited International conference

    Shigeru Kasahara

    Seminar at Karlsruhe Institute of Technology, Karlsruhe, Germany  2014.1.30 

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  • Nordal s-wave Superconductivity in Iron-based Superconductors Invited International conference

    Shigeru Kasahara

    International Union of Materials Research Society – International Conference in Asia (IUMRS-ICA 2013), Bangalore, India.  2013.12.16 

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  • Nematic transition and hidden quantum critical point in iron-pnictide superconductors Invited International conference

    Shigeru Kasahara

    American Physical Society (APS), March Meeting 2013, Baltimore, Maryland, USA.  2013.3.18 

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  • Electronic Nematic Ordering in Iron-based Superconductor Invited International conference

    Shigeru Kasahara

    The 9th International Conference on New Theories, Discoveries and Applications of Superconductors and Related Materials (New3SC-9), Frascati - Rome, Italy.  2012.9.16 

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  • Quantum criticality and emergent electronic nematic phase in an iron-based superconductor BaFe2(As1-xPx)2 with line nodes Invited International conference

    Shigeru Kasahara

    Seminar at Ames Laboratory & Iowa State University, USA  2012.8.7 

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  • 鉄系超伝導体における電子ネマティック秩序 Invited

    笠原 成

    新学術領域研究「重い電子系の形成と秩序化」ワークショップ ~重い電子系における格子・フォノンの役割~  2012.6 

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  • 鉄系超伝導体における電子ネマティック秩序相の形成 Invited

    笠原 成

    京都大学基礎物理学研究所研究会「鉄系高温超伝導の物理 ~スピン・軌道・格子~」  2012.6 

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  • Nematic phase persisting above the superconducting dome of BaFe2(As1-xPx)2 International conference

    Shigeru Kasahara

    American Physical Society (APS), March Meeting 2012, Boston, MA, USA.  2012.2.27 

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  • Quantum criticality in iron-pnictides as seen in isovalently doped BaFe2(As1-xPx)2 superconductors Invited International conference

    Shigeru Kasahara

    2011 International Symposium on Superconductivity  2011.10.24 

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  • Magnetic Torque Evidence for Broken Rotational Symmetry in the Tetragonal Phase of BaFe2(As1-xPx)2 Single Crystals International conference

    Shigeru Kasahara

    American Physical Society (APS), March Meeting 2011, Dallas, TX, USA.  2011.3.21 

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  • Isovalent phosphorus doping as a model system to study Fe-pnictides Invited International conference

    Shigeru Kasahara

    Mini Workshop on Iron-Based Superconductors  2010.11 

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  • Non-Fermi Liquid Transport Properties in Phosphorous Substituted Iron-Arsenides International conference

    Shigeru Kasahara

    American Physical Society (APS), March Meeting 2010, Portland, Oregon, USA.  2010.3.15 

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Awards

  • Young Scientist Award of the Physical Society of Japan

    2014  

    Shigeru Kasahara

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Research Projects

  • 極限定常磁場下での精密熱輸送測定の実装とエキゾチック凝縮相の物性開拓

    Grant number:22KK0036  2022.10 - 2028.03

    日本学術振興会  科学研究費助成事業 国際共同研究加速基金(国際共同研究強化(B))  国際共同研究加速基金(国際共同研究強化(B))

    笠原 成, 木原 工, 今城 周作

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    Grant amount:\20150000 ( Direct expense: \15500000 、 Indirect expense:\4650000 )

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  • 時間および空間反転対称性を破る奇パリティ・アナポール秩序の解明

    Grant number:21H04443  2021.04 - 2025.03

    日本学術振興会  科学研究費助成事業 基盤研究(A)  基盤研究(A)

    笠原 成

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    Grant amount:\43290000 ( Direct expense: \33300000 、 Indirect expense:\9990000 )

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  • Precision measurements of quantum liquid crystals

    Grant number:19H05824  2019.06 - 2024.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    花栗 哲郎, 佐藤 卓, 笠原 成, 芝内 孝禎, 清水 康弘, 廣理 英基, 和達 大樹

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    Grant amount:\349440000 ( Direct expense: \268800000 、 Indirect expense:\80640000 )

    電荷液晶に関して、鉄系超伝導体FeSeにおけるSeのTe置換の研究に着手した。Te置換を行うと、ネマティシティとバンド構造のトポロジーが変化する。これまで、相分離のために通常の作製方法では低Te置換領域の単結晶が得られなかったが、化学蒸気輸送法を用いて単結晶作製に成功した。これにより、電子相図が明らかになった他、STMを用いた電子状態評価も可能になった。
    スピン液晶に関しては、Kitaev量子スピン系候補物質RuCl3の磁気励起をNMRによって詳細に調べ、分数化した準粒子の根拠となる2種類のスピンギャップの存在を突き止めた。また、RuX3 (X = Br, I) の中性子回折実験を行い、結晶構造および磁気構造を決定した。さらに、Ca3ReO5Cl2におけるスピノン束縛状態や、バナジウム硫酸塩におけるスピンネマティック相を中性子実験によって調べた。
    電子対液晶に関しては、昨年度に引き続きFeSeにおけるFFLO状態の研究を行った。特に、精密比熱測定により、上部臨界磁場よりも低磁場において比熱の磁場依存性に明瞭なキンクを観測し、STMの結果と合わせて、FFLO状態の節が表面にピン止めされるモデルを提唱した。
    手法開発では、X線自由電子レーザーの超短パルス性を利用して時間分解X線分光を行い、元素別磁化ダイナミクスを観測した。また、超短パルスの赤外線レーザーを用いた時間分解磁気光学顕微鏡の建設を行い、レーザー照射後の強磁性体薄膜のスピンのダイナミクスをサブミクロン、フェムト秒のスケールで観測できるようになった。また、低温強磁場中でTHz-STMを行うための導光技術の開発を行い、約1 m離れた場所に励起レーザーやTHzパルスビームを制御して照射可能になった。

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  • Rotational symmetry breaking in strongly correlated quantum matters

    Grant number:18H05227  2018.06 - 2023.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (S)  Grant-in-Aid for Scientific Research (S)

    松田 祐司, 芝内 孝禎, 笠原 成, 笠原 裕一, 柳瀬 陽一

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    Grant amount:\198250000 ( Direct expense: \152500000 、 Indirect expense:\45750000 )

    (1) 鉄系高温超伝導体のネマティック揺らぎのもたらす異常電子状態
    Fe(Se1-xSx)におけるネマティック量子臨界点(x ~ 0.16)において超伝導のギャップ構造が劇的に変わることを明らかにした[Y. Sato et al., PNAS (2018); T. Hanaguri et al., Sci, Adv. (2018)]。さらに強磁場中のノーマル状態の輸送現象が、ネマティック揺らぎにより非フェルミ流体的な振る舞いを示すことも明らかにした[S. Licciardello et al., Nature (2019)]。
    (2) 量子スピン液体のエキゾチック準粒子
    3次元パイロクロアPr2Zr2O7 では、100 mK 以下において熱伝導が異常に大きくなる現象が観測され、これがトポロジカル励起であるフォトン励起である可能性を示した。また1-2K では量子モノポール励起も観測されることも示した[Y. Tokiwa et al., J. Phys. Soc. Jpn. (2018)]。さらにキタエフ・スピン液体候補物質であるα-RuCl3 に対し熱ホール効果の測定を行い、有限の熱ホール効果が観測されるだけでなく[Y. Kasahara et al., Phys. Rev. Lett. (2018)]、熱ホール効果が半整数値に量子化されることを発見した[Y. Kasahara et al., Nature (2018)]。これはマヨラナ粒子と非可換エニオンの存在を直接示すものであり、分数量子ホール効果における電荷の分数化と同様にスピンの分数化の証拠を与える。
    (3) 絶縁体における量子振動の観測
    近藤絶縁体YbB12 において量子振動測定を行ない、その結果、磁化だけでなく電気抵抗にも量子振動が現れることを発見した[Z. Xiang et al., Science (2018)]。

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  • 擬ギャップ状態における対称性の破れの解明

    2018.04 - 2021.03

    文部科学省  科学研究費補助金 基盤研究(B) 

    笠原 成

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  • 量子スピン液体における創発準粒子の解明

    Grant number:18H03680  2018.04 - 2021.03

    日本学術振興会  科学研究費助成事業  基盤研究(A)

    松田 祐司, 笠原 成, 笠原 裕一, 宇田川 将文

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    Grant amount:\45110000 ( Direct expense: \34700000 、 Indirect expense:\10410000 )

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  • 次世代高感度磁気トルク測定の構築と強相関電子系への応用

    2016.04 - 2019.03

    文部科学省  科学研究費補助金 挑戦的萌芽研究 

    笠原 成

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  • Superconductivity and nematicity in iron-based superconductors

    Grant number:16H04024  2016.04 - 2019.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Hanaguri Tetsuo, KASAHARA Shigeru, MACHIDA Tadashi, MATSUDA Yuji, SHIBAUCHI Takasada, TAMEGAI Tsuyoshi, EREMIN Ilya

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    Grant amount:\15730000 ( Direct expense: \12100000 、 Indirect expense:\3630000 )

    Relation between superconductivity and nematicity, which is spontaneous breaking of lattice rotational symmetry, has been argued in iron-based superconductors. We suppressed nematic phase of FeSe by substituting S for Se and investigated evolutions of band structure and superconducting gap by spectroscopic-imaging scanning tunneling microscopy. We found that the band structure evolves smoothly across the nematic end point whereas the superconducting gap exhibits abrupt change. This result indicates that nematicity plays important role for superconductivity.

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  • Exotic electroinc state and quantum condensate in ultra-shallow band materials(Fostering Joint International Research)

    Grant number:15KK0160  2016.04 - 2018.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Fund for the Promotion of Joint International Research (Fostering Joint International Research)

    Shigeru Kasahara

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    Authorship:Principal investigator  Grant type:Competitive

    The superconducting semimetal FeSe has been found to be deep inside the BCS-BEC crossover regime. In this work, a team of scientists has investigated heat transports in FeSe in intensive fields up to 35 T and found compelling evidence of a distinct high-field superconducting phase which is separated from the usual superconducting phase via a first-order phase transition. This high-field phase is attributed to an exotic state, the so-called FFLO phase, first predicted in 1964. In the isovalently substituted FeSe1-xSx superconductors, the team found non-Fermi liquid charge transports in the vicinity of a novel type of quantum critical point (QCP) of pure nematic order without accompanying other orders. The set of anomalous charge transport properties show striking resemblance to those reported in high-Tc cuprates and heavy Fermion superconductors. A common set of anomalous charge transport properties captures a universal feature of the non-Fermi liquid transport properties near the QCP.

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  • 超シャロウバンド物質における新奇電子状態と量子凝縮相

    2015.04 - 2018.03

    文部科学省  科学研究費補助金 基盤研究(B) 

    笠原 成

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  • Fabrication of Heavy Fermion Superlattices

    Grant number:25220710  2013.05 - 2018.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (S)  Grant-in-Aid for Scientific Research (S)

    Matsuda Yuji

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    Grant amount:\244270000 ( Direct expense: \187900000 、 Indirect expense:\56370000 )

    By fabricating various artificial superlattices made of heavy fermion compounds, we studied the quantum criticality and novel superconducting states in strongly correlated electron systems. In hybrid superlattices consisting of alternating atomic layers of d-wave superconductor CeCoIn5 and antiferromagnetic metal CeRhIn5, we demonstrated that superconducting pairing can be tuned nontrivially by magnetic fluctuations injected through the interface. In tricolor Kondo superlattices, where CeCoIn5 sandwiched by two different nonmagnetic metals, we found that the Rashba spin-orbit interaction induced global inversion symmetry breaking leads to profound changes in the superconducting properties of CeCoIn5. We also succeeded the in-situ STM observation of electronic structure of CeCoIn5 and CeRhIn5 thin films. We found that the films have very wide atomically flat terraces, demonstrating that the Kondo lattices grown MBE provide a new playground for exploring exotic superconducting states.

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  • 鉄系超伝導体におけるスピン及び軌道の物理と異常常伝導相の研究

    2012.04 - 2015.03

    文部科学省  科学研究費補助金 若手研究(A) 

    笠原 成

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    Authorship:Principal investigator  Grant type:Competitive

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  • Phase structures of superconducting gaps in iron-based superconductors

    Grant number:24340089  2012.04 - 2015.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    HANAGURI Tetsuo, NIITAKA Seiji, KITAGAWA Kentaro, SASAGAWA Takao, KIM KeeHoon, WATASHIGE Tatsuya, KASAHARA Shigeru, SHIBAUCHI Takasada, MATSUDA Yuji, WOFT Thomas, MEINGAST Christoph, V. LÖHNEYSEN Hilbert

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    Grant amount:\20020000 ( Direct expense: \15400000 、 Indirect expense:\4620000 )

    We have used spectroscopic imaging scanning tunneling microscopy to investigate the superconducting gaps and the electronic states of the iron-based superconductors LiFeAs and FeSe. We found that some defects in LiFeAs generate in-gap bound state. We also examined the effects of twin boundaries on the superconducting gap of FeSe and found that the twin boundary induces a novel superconducting state that breaks the time-reversal symmetry. The band dispersions of FeSe were determined by the quasi-particle interference effect. The estimated Fermi energy is smaller than 10 meV, being of the same order as the superconducting gap. This means that FeSe is in the BCS-BEC crossover regime. The observed quasi-particle interference patterns possess strong in-plane anisotropy which may reflect the orbital ordering in this material.

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  • 角度分解トンネル分光測定の開発

    2012.04 - 2014.03

    文部科学省  科学研究費補助金 挑戦的萌芽研究 

    笠原 成

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    Authorship:Principal investigator  Grant type:Competitive

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  • Elucidating the origin of high temperature superconductivity in iron-pnictides via the growth of epitaxial thin films

    Grant number:21740254  2009.04 - 2011.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    KASAHARA Shigeru, TERASHIMA Takahito, SHIBAUCHI Takasada, MATSUDA Yuji

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    Authorship:Principal investigator  Grant type:Competitive

    We have succeeded in in-situ growth of epitaxial thin films of iron-pnictides, which are remarked as the second generation materials of high temperature superconductors. Optimally doped superconducting thin films are successfully grown by pulsed laser deposition (PLD) technique using exima laser. We have also grown single crystalline samples which complement the thin films and performed precise experiments on the physical properties of the obtained materials.

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  • 時間反転対称性の破れを伴った超伝導状態におけるドメイン構造の研究

    Grant number:18740214  2006.04 - 2008.03

    文部科学省  科学研究費補助金 若手研究(B)  若手研究(B)

    笠原 成

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    Authorship:Principal investigator  Grant type:Competitive

    時間反転対称性の破れた超伝導状態を示す充填スクッテルダイト化合物PrOs_4Sb_<12>において、微小ホール素子法により試料表面における局所的な磁化を測定し、これによる自発的内部磁場の直接観測と、その空間分布に関する知見を得ることを目的とした実験を行なった。対象物質であるPrOs_4Sb_<12>は、Pr元素に基づく初の重い電子超伝導体であり、超伝導二段転移や秩序関数が内部自由度を伴った多重超伝導の可能性、超伝導状態そのものの発現により微弱な内部磁場を発生させる時間反転対称性の破れた超伝導等、数多くの特異な現象を示す。
    本研究の第一の研究成果として、PrOs_4Sb_<12>の超伝導二段転移に関する知見を得たことが挙げられる。微小ホール素子を複数配列させた局所磁化の多点測定により、PrOs_4Sb_<12>では異なる転移温度を与える二つの相がミクロンスケールで不均一に分布していることが明らかになった。この起源としては希土類充填率の不完全性が考えられ、不完全な希土類充填率が存在するような試料内部では、本来の転移温度より高い超伝導転移が実現されている可能性が考えられる。第二の成果は、超伝導二段転移が明瞭に観測されるような試料表面においては、第一の超伝導転移直下より強磁性的な正の局所磁化が現れる場合があることを明らかにした点である。この局所磁化の異常は時間反転対称性の破れと関連すると考えられ、PrOs_4Sb_<12>における時間反転対称性の破れには、超伝導二段転移を与える高温相の存在が重要であることを示唆している。置換試料であるPr(Os_χRu_<1-χ>)_4Sb_<12>、並びに(Pr_<1-χ>La_χ)Os_4Sb_<12>では、超伝導二段転移と時間反転対称性の破れが観測される組成領域が全く同一であり、このことからも二つの特異な現象が密接に関連していることが示唆される。

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