研究者詳細 - 笠原　成

論文 - 笠原　成

分割表示 >> ／全件表示 163 件中 1 - 163 件目

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年6月

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年3月

掲載種別：研究論文（学術雑誌）出版者・発行元：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

researchmap

その他リンク： 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年2月

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

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

Physical Review B 2024年1月

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年1月

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

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

Communications Physics 2023年7月

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

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年7月

掲載種別：研究論文（学術雑誌）出版者・発行元：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

researchmap

その他リンク： https://www.nature.com/articles/s42005-023-01286-x

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

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年7月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：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 FeSe_1−xS_x and FeSe_1−xTe_x 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

researchmap

その他リンク： https://www.nature.com/articles/s41467-023-39730-9

Enhanced Superconducting Pairing Strength near a Pure Nematic Quantum Critical Point 査読

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年3月

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

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

Scientific Reports 12 ( 1 ) 2022年12月

掲載種別：研究論文（学術雑誌）出版者・発行元：Springer Science and Business Media LLC

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

researchmap

その他リンク： https://www.nature.com/articles/s41598-022-13155-8

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

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

PHYSICAL REVIEW B 106 ( 6 ) 2022年8月

Transport evidence for decoupled nematic and magnetic criticality in iron chalcogenides 査読

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

Communications Physics 2022年4月

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

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年1月

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

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年1月

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

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年12月

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

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年12月

掲載種別：研究論文（学術雑誌）出版者・発行元：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

researchmap

その他リンク： https://www.nature.com/articles/s41598-021-96277-9

Discovery of mesoscopic nematicity wave in iron-based superconductors 査読

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年9月

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

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年9月

Description of Resonant Inelastic X-Ray Scattering in Correlated Metals 査読

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年9月

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

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年7月

Quadrupolar charge dynamics in the nonmagnetic FeSe1−xSx superconductors 査読

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

Proceedings of the National Academy of Sciences 118 ( 20 ) e2020585118 - e2020585118 2021年5月

掲載種別：研究論文（学術雑誌）出版者・発行元：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

researchmap

その他リンク： https://syndication.highwire.org/content/doi/10.1073/pnas.2020585118

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

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年4月

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

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年2月

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

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年11月

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

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年9月

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

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年7月

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

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

Modern Physics Letters B 2040048 - 2040048 2020年6月

掲載種別：研究論文（学術雑誌）出版者・発行元：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

researchmap

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

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

Physical Review B 2020年4月

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

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年3月

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

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年1月

Measuring magnetic field texture in correlated electron systems under extreme conditions 査読

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年12月

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> 査読

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年12月

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

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年12月

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

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年9月

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

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年9月

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

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

Physical Review B 100 ( 6 ) 2019年8月

Diagonal nematicity in the pseudogap phase of HgBa2CuO4+δ 査読

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

Nature Communications 10 ( 1 ) 3282 2019年7月

Ultrafast nematic-orbital excitation in FeSe 査読

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年4月

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

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年3月

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

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年1月

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

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

Papers in Physics 11 2019年

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

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

Physical Review Letters 122 ( 7 ) 077001 2019年

Electrical resistivity across a nematic quantum critical point 査読

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

Nature 567 ( 7747 ) 213 - 217 2019年

STMを用いたFe(Se,S)の正方晶相における電子状態の観測

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 74.1 1952 - 1952 2019年

Superconducting gap anisotropy sensitive to nematic domains in FeSe 査読

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年12月

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

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

AIP ADVANCES 8 ( 10 ) 2018年10月

Quantum oscillations of electrical resistivity in an insulator 査読国際誌

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年8月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Science

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

researchmap

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

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年7月

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

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

SCIENCE ADVANCES 4 ( 5 ) eaar6419 2018年5月

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

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年2月

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

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年

FeSe_1-xS_x(x = 0.12) の磁気秩序相近傍における高圧下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 73 ( 0 ) 1390 - 1390 2018年

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

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年11月

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

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年10月

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

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

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 86 ( 8 ) 2017年8月

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

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年7月

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

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年1月

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

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年9月

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年8月

Charge-induced nematicity in FeSe 査読

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年8月

Nematic quantum critical point without magnetism in FeSe1-xSx superconductors 査読

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年7月

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

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年7月

Magnetotransport study of the pressure-induced antiferromagnetic phase in FeSe 査読

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

Physical Review B 93 ( 18 ) 2016年5月

Magnetotransport study of the pressure-induced antiferromagnetic phase in FeSe 査読

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

PHYSICAL REVIEW B 93 ( 18 ) 2016年5月

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年3月

Fermi surface reconstruction in FeSe under high pressure 査読

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年3月

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

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年2月

Fermi surface reconstruction in FeSe under high pressure 査読

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年

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年11月

掲載種別：研究論文（学術雑誌）

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

arXiv

researchmap

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

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年11月

Momentum-dependent sign inversion of orbital order in superconducting FeSe 査読

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年11月

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

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年11月

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

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年10月

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

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

PHYSICAL REVIEW B 92 ( 14 ) 1 - 144509 2015年10月

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

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年7月

Pressure-Induced Antiferromagnetic Transition and Phase Diagram in FeSe 査読

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年6月

Optical conductivity evidence of clean-limit superconductivity in LiFeAs 査読

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

PHYSICAL REVIEW B 91 ( 17 ) 2015年5月

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

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年4月

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

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年3月

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

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

PHYSICAL REVIEW B 91 ( 6 ) 2015年2月

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

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年1月

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.

日本物理学会講演概要集 70 1938 - 1938 2015年

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年

Anomalous critical fields in quantum critical superconductors 査読

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年12月

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

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年12月

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

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年11月

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

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年10月

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年9月

掲載種別：研究論文（学術雑誌）

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

arXiv

researchmap

Infrared pseudogap in cuprate and pnictide high-temperature superconductors 査読

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年7月

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

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年6月

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 査読

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年3月

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

PHYSICAL REVIEW B 89 ( 11 ) 2014年3月

Pseudogap formation above the superconducting dome in iron pnictides 査読

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年1月

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

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年

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

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年6月

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

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

PHYSICAL REVIEW B 87 ( 17 ) 2013年5月

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

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年3月

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

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

Physical Review B - Condensed Matter and Materials Physics 87 ( 10 ) 2013年3月

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

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

PHYSICAL REVIEW B 87 ( 10 ) 2013年3月

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

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年3月

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

Sci. Rep. 4, 7292 (2014) 2013年1月

掲載種別：研究論文（学術雑誌）

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

arXiv

researchmap

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

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年9月

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

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年7月

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

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年6月

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

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年6月

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

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

PHYSICAL REVIEW B 85 ( 18 ) 2012年5月

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

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年5月

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

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年4月

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

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年3月

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

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

Physical Review B - Condensed Matter and Materials Physics 85 ( 6 ) 2012年2月

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

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

PHYSICAL REVIEW B 85 ( 6 ) 2012年2月

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

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年1月

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

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年1月

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

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年11月

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

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年8月

Specific heat discontinuity, ΔC, at Tc in BaFe2(As0.7P0.3)2-consistent with unconventional superconductivity. 査読

Kim JS, Stewart GR, Kasahara S, Shibauchi T, Terashima T, Matsuda Y

Journal of physics. Condensed matter : an Institute of Physics journal 23 ( 22 ) 222201 - 5 2011年6月

Nesting of electron and hole Fermi surfaces in nonsuperconducting BaFe2P2 査読

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

PHYSICAL REVIEW B 83 ( 22 ) 2011年6月

Orbital-Independent Superconducting Gaps in Iron Pnictides 査読

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年4月

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

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

APPLIED PHYSICS EXPRESS 4 ( 3 ) 1 - 35801 2011年3月

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

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年3月

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

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

PHYSICAL REVIEW B 83 ( 6 ) 2011年2月

鉄系超伝導体BaFe2(As1-xPx)2にみる非フェルミ液体的電子輸送現象と量子臨界点的振る舞い

笠原成

京都大学低温物質科学研究センター誌 ( 17 ) 10 - 18 2010年12月

記述言語：日本語出版者・発行元：低温物質科学研究センター

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

CiNii Article

CiNii Books

researchmap

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

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年12月

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

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年12月

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

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年12月

Characterization of FeSe single crystals 査読

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

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 470 S497 - S498 2010年12月

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

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年12月

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

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年9月

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

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年9月

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

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

PHYSICAL REVIEW B 81 ( 21 ) 2010年6月

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

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年6月

Evolution from Non-Fermi to Fermi Liquid Transport Properties by Isovalent Doping in BaFe2(As1-xPx)2 Superconductors 査読

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

Phys. Rev. B 81, 184519, (2010) 81 ( 18 ) 2010年5月

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

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年2月

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> 査読

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年1月

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

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

PHYSICAL REVIEW B 81 ( 2 ) 1 - 20503 2010年1月

Crystal Growth and Characterization of FeAs-based Superconductors 査読

Hiroyuki Takeya, Shigeru Kasahara, Kazuto Hirata

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

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

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

Physical Chemistry Chemical Physics 12 ( 40 ) 2010年

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

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年5月

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

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

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 468 ( 15-20 ) 1231 - 1233 2008年9月

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 査読

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

JOURNAL OF PHYSICS-CONDENSED MATTER 20 ( 38 ) 2008年9月

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

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

PHYSICA B-CONDENSED MATTER 403 ( 5-9 ) 1078 - 1080 2008年4月

Low temperature specific heat of ternary germanide superconductor La3Pd4Ge4 査読

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

PHYSICA B-CONDENSED MATTER 403 ( 5-9 ) 1119 - 1121 2008年4月

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

H. Fujii, S. Kasahara

JOURNAL OF PHYSICS-CONDENSED MATTER 20 ( 7 ) 2008年2月

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

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年1月

Specific heat of lithium ternary borides under magnetic field 査読

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

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 463 111 - 114 2007年10月

Positive local magnetization in the superconducting state of PrOs4Sb12 査読

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

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 463 71 - 75 2007年10月

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

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

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 460 696 - 697 2007年9月

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

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

PHYSICAL REVIEW B 76 ( 10 ) 2007年9月

Pressure effect and superconducting properties of lithium ternary borides 査読

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

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 460 89 - 90 2007年9月

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

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

MOLECULAR IMMUNOLOGY 44 ( 9 ) 2378 - 2387 2007年3月

Physical properties of Li2Pd3B and Li2Pt3B superconductors 査読

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年

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年

Local field measurements in PrOs4Sb12 with broken time-reversal symmetry 査読

Shigeru Kasahara, Tsuyoshi Tamegai, Hitoshi Sugawara, Hideyuki Sato

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

Comparative study of anisotropic superconductivity in CaAlSi and CaGaSi 査読

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

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 426 ( I ) 208 - 212 2005年10月

Peculiar superconductivity in PrOs4Sb12 probed by local magnetization 査読

S Kasahara, T Tamegai, H Sugawara, H Sato

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 426 ( I ) 381 - 385 2005年10月

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

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

Physical Review B - Condensed Matter and Materials Physics 71 ( 22 ) 2005年6月

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

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

PHYSICAL REVIEW B 71 ( 22 ) 2005年6月

Doping dependence of crossing vortex lattice in Bi2Sr2CaCu2O8+y 査読

S Kasahara, N Kameda, M Tokunaga, T Tamegai

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 412 ( SPEC. ISS. ) 440 - 443 2004年10月

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

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

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 388 607 - 608 2003年5月

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

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

SYNTHETIC METALS 137 ( 1-3 ) 1283 - 1284 2003年4月

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

Shigeru Kasahara, Yutaka Nishio, Koji Kajita

Synthetic Metals 120 ( 1-3 ) 937 - 938 2001年3月

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

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

Synthetic Metals 103 ( 1-3 ) 1822 - 1823 1999年6月

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年

　前のページ - 次のページ　

<笠原 成>

論文 - 笠原 成

<笠原　成>

論文 - 笠原　成