Updated on 2024/03/14

写真a

 
KAWASAKI Shinji
 
Organization
Faculty of Environmental, Life, Natural Science and Technology Associate Professor
Position
Associate Professor
Contact information
メールアドレス
Homepage
https://www.physics.okayama-u.ac.jp/zheng_homepage/
External link

Degree

  • D.Sc. ( 2004.3   Osaka University )

Research Interests

  • superconductivity

  • charge density wave

  • magnetism

  • uniaxial strain

  • strongly correlated electron systems

  • high magnetic field

  • Nuclear magnetic resonance / nuclear quadrupole resonance

  • high Tc cuprate

  • heavy fermion systems

  • high pressure

Research Areas

  • Natural Science / Magnetism, superconductivity and strongly correlated systems

Education

  • Osaka University   大学院基礎工学研究科   博士後期課程物理系専攻

    2001.4 - 2004.3

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    Country： Japan

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  • Osaka University   大学院基礎工学研究科   博士前期課程物理系専攻

    1999.4 - 2001.3

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    Country： Japan

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  • Osaka University   基礎工学部   物性物理工学科

    1995.4 - 1999.3

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    Country： Japan

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  • 大阪府立高津高等学校    

    1992.4 - 1995.3

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    Country： Japan

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Research History

  • Okayama University   Faculty of Science Department of Physics   Associate Professor

    2013.1

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    Country：Japan

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  • Okayama University   Faculty of Science Department of Physics   senior assistant professor

    2006.4 - 2012.12

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    Country：Japan

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  • Osaka University   Graduate School of Engineering Science

    2005.4 - 2006.3

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    Country：Japan

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  • Osaka University   Graduate School of Engineering Science

    2004.4 - 2005.3

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    Country：Japan

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  • Osaka University   Graduate School of Engineering Science

    2003.4 - 2004.3

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    Country：Japan

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Professional Memberships

Committee Memberships

  • 日本物理学会   会誌編集委員（第８０期～第８１期）  

    2024.4 - 2026.3   

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    Committee type：Academic society

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  • 強相関電子系国際会議SCES2019   現地実行委員  

    2019.9   

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    Committee type：Academic society

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  • 高温超伝導フォーラム   幹事  

    2017.10 - 2019.9   

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    Committee type：Academic society

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  • 日本物理学会   領域８運営委員代表  

    2015.4 - 2015.9   

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    Committee type：Academic society

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  • 日本物理学会   第71-72期代議員  

    2015.3 - 2017.3   

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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  

    2014.10 - 2015.3   

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    Committee type：Academic society

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  • 日本物理学会   第65回年次大会 実行委員  

    2010   

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Papers

  • Single Crystal Growth of and Hyperfine Couplings in the Spin-Triplet Superconductor K2Cr3As3 Reviewed

    Seigo Ogawa, Tomoki Miyoshi, Kazuaki Matano, Shinji Kawasaki, Yoshihiko Inada, Guo-qing Zheng

    Journal of the Physical Society of Japan   92 ( 6 )   2023.6

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

    DOI： 10.7566/jpsj.92.064711

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  • Antiferromagnetic spin fluctuations and superconductivity in NbRh2B2 and TaRh2B2 with a chiral crystal structure Reviewed

    Kazuaki Matano, Ryo Ogura, Matéo FONTAINE, Harald O. Jeschke, Shinji Kawasaki, Guo-qing Zheng

    Physical Review B   104 ( 22 )   2021.12

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

    DOI： 10.1103/physrevb.104.224508

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  • Charge Order and Fluctuations in Bi2Sr2−xLaxCuO6+δ Revealed by 63,65Cu-Nuclear Magnetic Resonance Invited Reviewed

    Shinji Kawasaki, Madoka Ito, Dai Kamijima, Chengtian Lin, Guo-qing Zheng

    Journal of the Physical Society of Japan   90 ( 11 )   111008 - 111008   2021.11

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Physical Society of Japan  

    DOI： 10.7566/jpsj.90.111008

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  • Transport signatures of the pseudogap critical point in the cuprate superconductor Bi2Sr2−xLaxCuO6+δ Reviewed

    M. Lizaire, Anaëlle Legros, A. Gourgout, S. Benhabib, S. Badoux, F. Laliberté, Marie-Eve Boulanger, A. Ataei, Gaël Grissonnanche, D. LeBoeuf, S. Licciardello, S. Wiedmann, S. Ono, H. Raffy, S. Kawasaki, G.-Q. Zheng, N. Doiron-Leyraud, Cyril Proust, Louis Taillefer

    Physical Review B   104 ( 1 )   2021.7

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

    DOI： 10.1103/physrevb.104.014515

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  • Localized-to-itinerant transition preceding antiferromagnetic quantum critical point and gapless superconductivity in CeRh0.5Ir0.5In5 Reviewed

    Shinji Kawasaki, Toshihide Oka, Akira Sorime, Yuji Kogame, Kazuhiro Uemoto, Kazuaki Matano, Jing Guo, Shu Cai, Liling Sun, John L. Sarrao, Joe D. Thompson, Guo-qing Zheng

    Communications Physics   3 ( 1 )   2020.8

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media {LLC}  

    <jats:title>Abstract</jats:title><jats:p>A fundamental problem posed from the study of correlated electron compounds, of which heavy-fermion systems are prototypes, is the need to understand the physics of states near a quantum critical point (QCP). At a QCP, magnetic order is suppressed continuously to zero temperature and unconventional superconductivity often appears. Here, we report pressure (<jats:italic>P</jats:italic>)-dependent <jats:sup>115</jats:sup>In nuclear quadrupole resonance (NQR) measurements on heavy-fermion antiferromagnet CeRh<jats:sub>0.5</jats:sub>Ir<jats:sub>0.5</jats:sub>In<jats:sub>5</jats:sub>. These experiments reveal an antiferromagnetic (AF) QCP at <jats:inline-formula><jats:alternatives><jats:tex-math>$${P}_{ { \rm{c } } }^{ { \rm{AF } } }=1.2$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
    <mml:msubsup>
    <mml:mrow>
    <mml:mi>P</mml:mi>
    </mml:mrow>
    <mml:mrow>
    <mml:mi>c</mml:mi>
    </mml:mrow>
    <mml:mrow>
    <mml:mi>AF</mml:mi>
    </mml:mrow>
    </mml:msubsup>
    <mml:mo>=</mml:mo>
    <mml:mn>1.2</mml:mn>
    </mml:math></jats:alternatives></jats:inline-formula> GPa where a dome of superconductivity reaches a maximum transition temperature <jats:italic>T</jats:italic><jats:sub>c</jats:sub>. Preceding <jats:inline-formula><jats:alternatives><jats:tex-math>$${P}_{ { \rm{c } } }^{ { \rm{AF } } }$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
    <mml:msubsup>
    <mml:mrow>
    <mml:mi>P</mml:mi>
    </mml:mrow>
    <mml:mrow>
    <mml:mi>c</mml:mi>
    </mml:mrow>
    <mml:mrow>
    <mml:mi>AF</mml:mi>
    </mml:mrow>
    </mml:msubsup>
    </mml:math></jats:alternatives></jats:inline-formula>, however, the NQR frequency <jats:italic>ν</jats:italic><jats:sub>Q</jats:sub> undergoes an abrupt increase at <jats:inline-formula><jats:alternatives><jats:tex-math>$${P}_{ { \rm{c } } }^{ { \rm{* } } }$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
    <mml:msubsup>
    <mml:mrow>
    <mml:mi>P</mml:mi>
    </mml:mrow>
    <mml:mrow>
    <mml:mi>c</mml:mi>
    </mml:mrow>
    <mml:mrow>
    <mml:mi>*</mml:mi>
    </mml:mrow>
    </mml:msubsup>
    </mml:math></jats:alternatives></jats:inline-formula> = 0.8 GPa in the zero-temperature limit, indicating a change from localized to itinerant character of cerium’s <jats:italic>f</jats:italic>-electron and associated small-to-large change in the Fermi surface. At <jats:inline-formula><jats:alternatives><jats:tex-math>$${P}_{ { \rm{c } } }^{ { \rm{AF } } }$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
    <mml:msubsup>
    <mml:mrow>
    <mml:mi>P</mml:mi>
    </mml:mrow>
    <mml:mrow>
    <mml:mi>c</mml:mi>
    </mml:mrow>
    <mml:mrow>
    <mml:mi>AF</mml:mi>
    </mml:mrow>
    </mml:msubsup>
    </mml:math></jats:alternatives></jats:inline-formula> where <jats:italic>T</jats:italic><jats:sub>c</jats:sub> is optimized, there is an unusually large fraction of gapless excitations well below <jats:italic>T</jats:italic><jats:sub>c</jats:sub> that implicates spin-singlet, odd-frequency pairing symmetry.</jats:p>

    DOI： 10.1038/s42005-020-00418-x

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  • Charge-density-wave order takes over antiferromagnetism in Bi2Sr2−x La x CuO6 superconductors Reviewed

    S. Kawasaki, Z. Li, M. Kitahashi, C. T. Lin, P. L. Kuhns, A. P. Reyes, Guo-qing Zheng

    Nature Communications   8 ( 1 )   2017.11

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media {LLC}  

    <jats:title>Abstract</jats:title><jats:p>Superconductivity appears in the cuprates when a spin order is destroyed, while the role of charge is less known. Recently, charge density wave (CDW) was found below the superconducting dome in YBa<jats:sub>2</jats:sub>Cu<jats:sub>3</jats:sub>O<jats:sub>
    <jats:italic>y</jats:italic>
    </jats:sub> when a high magnetic field is applied perpendicular to the CuO<jats:sub>2</jats:sub> plane, which was suggested to arise from incipient CDW in the vortex cores that becomes overlapped. Here by <jats:sup>63</jats:sup>Cu-nuclear magnetic resonance, we report the discovery of CDW induced by an in-plane field, setting in above the dome in single-layered Bi<jats:sub>2</jats:sub>Sr<jats:sub>2−<jats:italic>x</jats:italic>
    </jats:sub>La<jats:sub>
    <jats:italic>x</jats:italic>
    </jats:sub>CuO<jats:sub>6</jats:sub>. The onset temperature <jats:italic>T</jats:italic><jats:sub>CDW</jats:sub> takes over the antiferromagnetic order temperature <jats:italic>T</jats:italic><jats:sub>N</jats:sub> beyond a critical doping level at which superconductivity starts to emerge, and scales with the pseudogap temperature <jats:italic>T</jats:italic>*. These results provide important insights into the relationship between spin order, CDW and the pseudogap, and their connections to high-temperature superconductivity.</jats:p>

    DOI： 10.1038/s41467-017-01465-9

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  • Doping-enhanced antiferromagnetism in Ca1−xLaxFeAs2 Reviewed

    Shinji Kawasaki, Tomosuke Mabuchi, Satoki Maeda, Tomoki Adachi, Tasuku Mizukami, Kazutaka Kudo, Minoru Nohara, Guo-qing Zheng

    Physical Review B   92 ( 18 )   2015.11

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    DOI： 10.1103/physrevb.92.180508

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  • Coexistence of multiple charge-density waves and superconductivity in SrPt2As2 revealed by 75As−NMR/NQR and 195Pt−NMR Reviewed

    Shinji Kawasaki, Yoshihiko Tani, Tomosuke Mabuchi, Kazutaka Kudo, Yoshihiro Nishikubo, Daisuke Mitsuoka, Minoru Nohara, Guo-qing Zheng

    Physical Review B   91 ( 6 )   2015.2

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society ({APS})  

    DOI： 10.1103/physrevb.91.060510

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  • Magnetism and superconductivity in Sr2VFeAsO3 revealed by 75As- and 51V-NMR under elevated pressures Reviewed

    Keiji Ueshima, Fei Han, Xiyu Zhu, Hai-Hu Wen, Shinji Kawasaki, Guo-qing Zheng

    Physical Review B   89 ( 18 )   2014.5

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

    DOI： 10.1103/physrevb.89.184506

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  • The Mott State and Superconductivity in Face-Centred Cubic Structured Cs3C60: A133Cs-Nuclear Magnetic Resonance Study under Pressure Reviewed

    Shinji Kawasaki, Junji Fukui, Takeshi Motoyama, Yuta Suzuki, Seiji Shibasaki, Guo-qing Zheng

    Journal of the Physical Society of Japan   82 ( 1 )   014709 - 014709   2013.1

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    DOI： 10.7566/jpsj.82.014709

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  • Cu-NMR Study of Bi2Sr1.6La0.4CuO6+δ Superconductor in Very High Magnetic Fields Reviewed

    S Kawasaki, C T Lin, P L Kuhns, A P Reyes, Guo-qing Zheng

    Journal of Physics: Conference Series   400 ( 2 )   022052 - 022052   2012.12

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    Authorship：Lead author,　Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：{IOP} Publishing  

    DOI： 10.1088/1742-6596/400/2/022052

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  • Pseudogap Ground State and Its Doping Evolution in Bi2Sr2−x La x CuO6+δ : Removing the Superconducting State by the Application of Very High Magnetic Fields Reviewed

    Guo-qing Zheng, S. Kawasaki, C. T. Lin, P. L. Kuhns, A. P. Reyes

    Journal of Superconductivity and Novel Magnetism   25 ( 5 )   1249 - 1253   2012.7

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    DOI： 10.1007/s10948-012-1575-4

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  • Luttinger-volume violating Fermi liquid in the pseudogap phase of the cuprate superconductors Reviewed

    Jia-Wei Mei, Shinji Kawasaki, Guo-Qing Zheng, Zheng-Yu Weng, Xiao-Gang Wen

    Physical Review B   85 ( 13 )   2012.4

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

    DOI： 10.1103/physrevb.85.134519

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  • Antiferromagnetic Spin Fluctuations above the Dome-Shaped and Full-Gap Superconducting States of LaFeAsO1−xFx Revealed by 75As-Nuclear Quadrupole Resonance Reviewed

    T. Oka, Z. Li, S. Kawasaki, G. F. Chen, N. L. Wang, Guo-qing Zheng

    Physical Review Letters   108 ( 4 )   2012.1

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    DOI： 10.1103/physrevlett.108.047001

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  • As-NMR/NQR study of pressure-induced superconductivity in CaFe2As2 Reviewed

    S. Kawasaki, T. Oka, T. Tabuchi, X.F. Wang, X.H. Chen, Guo-qing Zheng

    Journal of Physics and Chemistry of Solids   72 ( 5 )   501 - 504   2011.5

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    DOI： 10.1016/j.jpcs.2010.10.010

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  • Multiple superconducting gap and anisotropic spin fluctuations in iron arsenides: Comparison with nickel analog Reviewed

    Z. Li, S. Kawasaki, T. Oka, T. Tabuchi, Y. Ooe, M. Ichioka, Z.A. Ren, Z.X. Zhao, J.L. Luo, N.L. Wang, X.C. Wang, Q.Q. Liu, C.Q. Jin, C.T. Lin, Guo-qing Zheng

    Journal of Physics and Chemistry of Solids   72 ( 5 )   492 - 496   2011.5

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier {BV}  

    DOI： 10.1016/j.jpcs.2010.10.038

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  • As-NQR study of superconductivity in LaRAsO1−F (R=Fe and Ni) Reviewed

    T. Oka, T. Tabuchi, Z. Li, S. Kawasaki, G.F. Chen, J.L. Luo, N.L. Wang, Guo-qing Zheng

    Journal of Physics and Chemistry of Solids   72 ( 5 )   497 - 500   2011.5

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier {BV}  

    DOI： 10.1016/j.jpcs.2010.10.022

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  • As-NMR/NQR Study of CaFe2As2under Pressure Reviewed

    Shinji Kawasaki, Toshihide Oka, Takahisa Tabuchi, X. F. Wang, X. H. Chen, Guo-qing Zheng

    Journal of the Physical Society of Japan   80 ( Suppl.A )   2011.1

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Physical Society of Japan  

    DOI： 10.1143/jpsjs.80sa.sa116

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  • Carrier-Concentration Dependence of the Pseudogap Ground State of Superconducting Bi2Sr2−xLaxCuO6+δ Revealed by 63,65Cu-Nuclear Magnetic Resonance in Very High Magnetic Fields Reviewed

    Shinji Kawasaki, Chengtian Lin, Philip L. Kuhns, Arneil P. Reyes, Guo-qing Zheng

    Physical Review Letters   105 ( 13 )   2010.9

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society ({APS})  

    DOI： 10.1103/physrevlett.105.137002

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  • Multiple Superconducting Gaps and Anisotropic Spin Fluctuations in Hole-Doped and Electron-Doped Iron-Pnictides: NMR Studies Reviewed

    Guo-qing Zheng, K. Matano, S. Kawasaki, Z. Li, G. L. Sun, D. L. Sun, C. T. Lin, G. F. Chen, J. L. Luo, N. L. Wang, Z. A. Ren, Z. X. Zhao

    Journal of Superconductivity and Novel Magnetism   23 ( 5 )   609 - 612   2010.7

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

    DOI： 10.1007/s10948-010-0749-1

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  • Pressure-induced unconventional superconductivity near a quantum critical point in CaFe2As2 Invited Reviewed

    S Kawasaki, T Tabuchi, X F Wang, X H Chen, Guo-qing Zheng

    Superconductor Science and Technology   23 ( 5 )   054004 - 054004   2010.5

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    Authorship：Lead author,　Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：{IOP} Publishing  

    DOI： 10.1088/0953-2048/23/5/054004

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  • Evidence for a full energy gap in the nickel pnictide superconductor LaNiAsO1−xFx from 75As nuclear quadrupole resonance Reviewed

    T. Tabuchi, Z. Li, T. Oka, G. F. Chen, S. Kawasaki, J. L. Luo, N. L. Wang, Guo-qing Zheng

    Physical Review B   81 ( 14 )   2010.4

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

    DOI： 10.1103/physrevb.81.140509

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  • Spin–Echo NMR in Pulsed High Magnetic Fields up to 48 T Reviewed

    Guo-qing Zheng, Kouta Katayama, Masahide Nishiyama, Shinji Kawasaki, Naoki Nishihagi, Shojiro Kimura, Masayuki Hagiwara, Koichi Kindo

    Journal of the Physical Society of Japan   78 ( 9 )   095001 - 095001   2009.9

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

    DOI： 10.1143/jpsj.78.095001

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  • Superconducting state in the noncentrosymmetric Mg9.3Ir19B16.7 and Mg10.5Ir19B17.1 revealed by NMR Reviewed

    K. Tahara, Z. Li, H. X. Yang, J. L. Luo, S. Kawasaki, Guo-qing Zheng

    Physical Review B   80 ( 6 )   2009.8

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

    DOI： 10.1103/physrevb.80.060503

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  • Measurement of electron correlations in LixCoO2 (x=0.0–0.35) using 59Co nuclear magnetic resonance and nuclear quadrupole resonance techniques Reviewed

    S. Kawasaki, T. Motohashi, K. Shimada, T. Ono, R. Kanno, M. Karppinen, H. Yamauchi, Guo-qing Zheng

    Physical Review B   79 ( 22 )   2009.6

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    DOI： 10.1103/physrevb.79.220514

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  • Two superconducting gaps in LaFeAsO0.92F0.08 revealed by 75As nuclear quadrupole resonance Reviewed

    S. Kawasaki, K. Shimada, G. F. Chen, J. L. Luo, N. L. Wang, Guo-qing Zheng

    Physical Review B   78 ( 22 )   2008.12

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society ({APS})  

    DOI： 10.1103/physrevb.78.220506

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  • 123Sb-NQR study of unconventional superconductivity in the filled skutterudite heavy-fermion compound PrOs4Sb12 under high pressure up to 3.82 GPa Reviewed

    S. Kawasaki, K. Katayama, H. Sugawara, D. Kikuchi, H. Sato, Guo-qing Zheng

    Physical Review B   78 ( 6 )   2008.8

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society ({APS})  

    DOI： 10.1103/physrevb.78.064510

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  • Unconventional superconductivity and antiferromagnetic quantum phase transition in CeRhIn5 : 115In-NQR study under pressure Reviewed

    M. Yashima, S. Kawasaki, H. Mukuda, Y. Kitaoka, H. Shishido, R. Settai, Y. Ōnuki

    Physica B: Condensed Matter   403 ( 5-9 )   914 - 916   2008.4

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier {BV}  

    DOI： 10.1016/j.physb.2007.10.062

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  • Pressure-induced unconventional superconductivity in the heavy-fermion antiferromagnet CeIn3: An 115In-NQR study under pressure Reviewed

    S. Kawasaki, M. Yashima, Y. Kitaoka, K. Takeda, K. Shimizu, Y. Oishi, M. Takata, T. C. Kobayashi, H. Harima, S. Araki, H. Shishido, R. Settai, Y. Ōnuki

    Physical Review B   77 ( 6 )   2008.2

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society ({APS})  

    DOI： 10.1103/physrevb.77.064508

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  • Sb-NQR Study of PrOs4Sb12under High Pressure Reviewed

    Shinji Kawasaki, Kouta Katayama, Masahide Nishiyama, Hisashi Kotegawa, Tatsuo C. Kobayashi, Hitoshi Sugawara, Daisuke Kikuchi, Hideyuki Sato, Guo-qing Zheng

    Journal of the Physical Society of Japan   77 ( Suppl.A )   330 - 332   2008.1

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Physical Society of Japan  

    DOI： 10.1143/jpsjs.77sa.330

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  • Pressure dependence of the superconducting transition and electron correlations in NaxCoO2∙1.3H2O Reviewed

    E. Kusano, S. Kawasaki, K. Matano, Guo-qing Zheng, R. L. Meng, J. Cmaidalka, C. W. Chu

    Physical Review B   76 ( 10 )   2007.9

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

    DOI： 10.1103/physrevb.76.100506

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  • Antiferromagnetic quantum phase transition in superconducting phase in CeRhIn5 Reviewed

    M. Yashima, S. Kawasaki, H. Mukuda, Y. Kitaoka, H. Shishido, R. Settai, Y. Ōnuki

    Physica C: Superconductivity and its Applications   460-462   670 - 671   2007.9

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier {BV}  

    DOI： 10.1016/j.physc.2007.03.035

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  • Quantum phase diagram of antiferromagnetism and superconductivity with a tetracritical point in CeRhIn5 in zero magnetic field Reviewed

    M. Yashima, S. Kawasaki, H. Mukuda, Y. Kitaoka, H. Shishido, R. Settai, Y. Ōnuki

    Physical Review B   76 ( 2 )   2007.7

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    DOI： 10.1103/physrevb.76.020509

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  • Experimental evidence for ferromagnetic spin-pairing superconductivity emerging in UGe2: A 73Ge-nuclear-quadrupole-resonance study under pressure Reviewed

    A. Harada, S. Kawasaki, H. Mukuda, Y. Kitaoka, Y. Haga, E. Yamamoto, Y. Ōnuki, K. M. Itoh, E. E. Haller, H. Harima

    Physical Review B   75 ( 14 )   2007.4

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    DOI： 10.1103/physrevb.75.140502

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  • Novel superconductivity at the magnetic critical point in heavy-fermion systems: a systematic study of NQR under pressure Reviewed

    Y Kitaoka, S Kawasaki, Y Kawasaki, T Mito, G-q Zheng

    Journal of Physics: Condensed Matter   19 ( 12 )   125202 - 125202   2007.3

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    DOI： 10.1088/0953-8984/19/12/125202

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  • Pressure-induced antiferromagnetic superconductivity in CeNiGe3 : A 73Ge-NQR study under pressure Reviewed

    A. Harada, S. Kawasaki, H. Mukuda, Y. Kitaoka, A. Thamizhavel, Y. Okuda, R. Settai, Y. Ōnuki, K.M. Itoh, E.E. Haller, H. Harima

    Journal of Magnetism and Magnetic Materials   310 ( 2 )   614 - 616   2007.3

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    DOI： 10.1016/j.jmmm.2006.10.883

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  • 73Ge-NQR study of heavy-fermion compound CeNi2Ge2 Reviewed

    S. Kawasaki, T. Sada, T. Miyoshi, H. Kotegawa, H. Mukuda, Y. Kitaoka, T.C. Kobayashi, T. Fukuhara, K. Maezawa, K.M. Itoh, E.E. Haller

    Journal of Magnetism and Magnetic Materials   310 ( 2 )   590 - 592   2007.3

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    DOI： 10.1016/j.jmmm.2006.10.232

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  • 115In-NQR study of CeRh1-xIrxIn5 under pressure Reviewed

    Y. Mugino, S. Kawasaki, M. Yashima, H. Mukuda, Y. Kitaoka, H. Shishido, Y. Ōnuki

    Journal of Magnetism and Magnetic Materials   310 ( 2 )   584 - 586   2007.3

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    DOI： 10.1016/j.jmmm.2006.10.224

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  • Novel phase diagram of antiferromagnetism and superconductivity in CeRhIn5 Reviewed

    M. Yashima, S. Kawasaki, H. Mukuda, Y. Kitaoka, H. Shishido, R. Settai, Y. Ōnuki

    Journal of Magnetism and Magnetic Materials   310 ( 2 )   322 - 324   2007.3

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    DOI： 10.1016/j.jmmm.2006.10.018

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  • Evidence for Point Nodes in the Superconducting Gap Function in the Filled Skutterudite Heavy-Fermion Compound PrOs4Sb12: 123Sb-NQR Study under Pressure Reviewed

    Kouta Katayama, Shinji Kawasaki, Masahide Nishiyama, Hitoshi Sugawara, Daisuke Kikuchi, Hideyuki Sato, Guo-qing Zheng

    Journal of the Physical Society of Japan   76 ( 2 )   023701 - 023701   2007.2

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    DOI： 10.1143/jpsj.76.023701

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  • Unconventional superconductivity and antiferromagnetic quantum criticality in CeRh1-xIrxIn5 Reviewed

    S. Kawasaki, M. Yashima, Y. Mugino, H. Mukuda, Y. Kitaoka, H. Shishido, Y. Ōnuki

    Physica B: Condensed Matter   378-380   400 - 401   2006.5

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    DOI： 10.1016/j.physb.2006.01.152

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  • Unconventional superconductivity in the itinerant ferromagnet UGe2:73Ge-NQR study under pressure Reviewed

    A. Harada, S. Kawasaki, H. Mukuda, Y. Kitaoka, Y. Haga, E. Yamamoto, Y. Ōnuki, K.M. Itoh, E.E. Haller, H. Harima

    Physica B: Condensed Matter   378-380   963 - 964   2006.5

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    DOI： 10.1016/j.physb.2006.01.368

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  • Evidence for the first-order phase transition from antiferromagnetism to paramagnetism in CeRhIn5 Reviewed

    M. Yashima, S. Kawasaki, Y. Kitaoka, H. Shishido, R. Settai, Y. Ōnuki

    Physica B: Condensed Matter   378-380   94 - 95   2006.5

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    DOI： 10.1016/j.physb.2006.01.537

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  • Evidence for Unconventional Superconducting Fluctuations in Heavy-Fermion Compound CeNi2Ge2 Reviewed

    S. Kawasaki, T. Sada, T. Miyoshi, H. Kotegawa, H. Mukuda, Y. Kitaoka, T. C. Kobayashi, T. Fukuhara, K. Maezawa, K. M. Itoh, E. E. Haller

    Journal of the Physical Society of Japan   75 ( 4 )   043702 - 043702   2006.4

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    DOI： 10.1143/jpsj.75.043702

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  • Enhancing the Superconducting Transition Temperature of CeRh1−xIrxIn5 due to the Strong-Coupling Effects of Antiferromagnetic Spin Fluctuations: An 115In Nuclear Quadrupole Resonance Study Reviewed

    Shinji Kawasaki, Mitsuharu Yashima, Yoichi Mugino, Hidekazu Mukuda, Yoshio Kitaoka, Hiroaki Shishido, Yoshichika Ōnuki

    Physical Review Letters   96 ( 14 )   2006.4

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    DOI： 10.1103/physrevlett.96.147001

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  • 115In-NQR study of antiferromagnetism and superconductivity in CeRhIn5 and CeIn3 under pressure Reviewed

    S. Kawasaki, M. Yashima, H. Kotegawa, T. Mito, Y. Kawasaki, G.-Q. Zheng, Y. Kitaoka, H. Shishido, S. Araki, D. Aoki, Y. Haga, R. Settai, Y. Ōnuki

    Journal of Physics and Chemistry of Solids   67 ( 1-3 )   497 - 499   2006.1

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    DOI： 10.1016/j.jpcs.2005.10.043

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  • Cooperative Phenomenon of Ferromagnetism and Unconventional Superconductivity in UGe2: A 73Ge-NQR Study under Pressure Reviewed

    A. Harada, S. Kawasaki, H. Kotegawa, Y. Kitaoka, Y. Haga, E. Yamamoto, Y. Ōnuki, K. M. Itoh, E. E. Haller, H. Harima

    Journal of the Physical Society of Japan   74 ( 10 )   2675 - 2678   2005.10

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    DOI： 10.1143/jpsj.74.2675

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  • Unconventional superconductivity near the antiferromagnetic criticality in CeCoIn5: a study of 115In-NQR under pressure Reviewed

    M. Yashima, S. Kawasaki, Y. Kawasaki, G.-q. Zheng, Y. Kitaoka, H. Shishido, R. Settai, Y. Haga, Y. Ōnuki

    Physica B: Condensed Matter   359-361   404 - 406   2005.4

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    DOI： 10.1016/j.physb.2005.01.080

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  • NMR/NQR experiments on heavy-fermion systems and superconductors Reviewed

    Y. Kitaoka, S. Kawasaki, Y. Kawasaki, H. Kotegawa, T. Mito

    Physica B: Condensed Matter   359-361   341 - 348   2005.4

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    DOI： 10.1016/j.physb.2005.01.057

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  • 115In-NQR study of antiferromagnetism and superconductivity near magnetic criticality in CeIn3 Reviewed

    S. Kawasaki, T. Mito, Y. Kawasaki, H. Kotegawa, .G.-q. Zheng, Y. Kitaoka, H. Shishido, S. Araki, R. Settai, Y. Ōnuki

    Physica B: Condensed Matter   359-361   413 - 415   2005.4

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    DOI： 10.1016/j.physb.2005.01.083

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  • Novel phase diagram of superconductivity and ferromagnetism in UGe2: a73Ge-NQR study under high pressure Reviewed

    Y Kitaoka, H Kotegawa, A Harada, S Kawasaki, Y Kawasaki, Y Haga, E Yamamoto, Y Ōnuki, K M Itoh, E E Haller, H Harima

    Journal of Physics: Condensed Matter   17 ( 11 )   S975 - S986   2005.3

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    DOI： 10.1088/0953-8984/17/11/030

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  • The phase diagram of antiferromagnetism and superconductivity in CeRhIn5: a study of115In NQR under pressure Reviewed

    S Kawasaki, M Yashima, T Mito, Y Kawasaki, G-q Zheng, Y Kitaoka, D Aoki, Y Haga, Y Ōnuki

    Journal of Physics: Condensed Matter   17 ( 11 )   S889 - S893   2005.3

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    DOI： 10.1088/0953-8984/17/11/019

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  • Evidence for Uniform Coexistence of Ferromagnetism and Unconventional Superconductivity in UGe2: A73Ge-NQR Study under Pressure Reviewed

    H. Kotegawa, A. Harada, S. Kawasaki, Y. Kawasaki, Y. Kitaoka, Y. Haga, E. Yamamoto, Y. Ōnuki, K. M. Itoh, E. E. Haller, H. Harima

    Journal of the Physical Society of Japan   74 ( 2 )   705 - 711   2005.2

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    DOI： 10.1143/jpsj.74.705

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  • Enhancing the Superconducting Transition Temperature of the Heavy Fermion Compound CeIrIn5 in the Absence of Spin Correlations Reviewed

    Shinji Kawasaki, Guo-qing Zheng, Hiroki Kan, Yoshio Kitaoka, Hiroaki Shishido, Yoshichika Ōnuki

    Physical Review Letters   94 ( 3 )   2005.1

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    DOI： 10.1103/physrevlett.94.037007

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  • Unconventional Superconductivity in Heavy-Fermion Systems Reviewed

    Y. Kitaoka, S. Kawasaki, T. Mito, Y. Kawasaki

    Journal of the Physical Society of Japan   74 ( 1 )   186 - 199   2005.1

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    DOI： 10.1143/jpsj.74.186

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  • Magnetic Criticality and Unconventional Superconductivity in CeCoIn5: Study of115In-Nuclear Quadrupole Resonance under Pressure Reviewed

    M. Yashima, S. Kawasaki, Y. Kawasaki, G.-q. Zheng, Y. Kitaoka, H. Shishido, R. Settai, Y. Haga, Y. Ōnuki

    Journal of the Physical Society of Japan   73 ( 8 )   2073 - 2076   2004.8

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    DOI： 10.1143/jpsj.73.2073

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  • New Superconducting and Magnetic Phases Emerge on the Magnetic Criticality in CeIn3 Reviewed

    S. Kawasaki, T. Mito, Y. Kawasaki, H. Kotegawa, G.-Q. Zheng, Y. Kitaoka, H. Shishido, S. Araki, R. Settai, Y. Ōnuki

    Journal of the Physical Society of Japan   73 ( 7 )   1647 - 1650   2004.7

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    DOI： 10.1143/jpsj.73.1647

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  • Magnetism and superconductivity near the quantum criticality in CeRhIn5 : 115In-NQR study under pressure Reviewed

    S Kawasaki, T Mito, Y Kawasaki, G.-q Zheng, Y Kitaoka, D Aoki, Y Haga, Y Onuki

    Journal of Magnetism and Magnetic Materials   272-276   E19 - E20   2004.5

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    DOI： 10.1016/j.jmmm.2003.11.122

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  • The microscopic coexistence of superconductivity and ferromagnetism in UGe2: 73Ge-NMR/NQR study Reviewed

    H. Kotegawa, S. Kawasaki, A. Harada, Y. Kawasaki, K. Okamoto, G.-q. Zheng, Y. Kitaoka, E. Yamamoto, Y. Haga, Y. Ōnuki, K.M. Itoh, E.E. Haller

    Journal of Magnetism and Magnetic Materials   272-276   E27 - E28   2004.5

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    DOI： 10.1016/j.jmmm.2003.12.410

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  • Unconventional superconductivity and antiferromagnetic spin fluctuations in the heavy fermion compound CeCoIn5: 115In-NQR study under pressure Reviewed

    M Yashima, S Kawasaki, Y Kawasaki, G.-q Zheng, Y Kitaoka, H Shishido, R Settai, Y Onuki

    Journal of Magnetism and Magnetic Materials   272-276   E679 - E681   2004.5

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    DOI： 10.1016/j.jmmm.2003.11.335

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  • Exotic Superconductivity in the Coexistent Phase of Antiferromagnetism and Superconductivity in CeCu2(Si0.98Ge0.02)2: A Cu-NQR Study under Hydrostatic Pressure Reviewed

    Yu Kawasaki, Kenji Ishida, Shinji Kawasaki, Takeshi Mito, Guo-qing Zheng, Yoshio Kitaoka, Christoph Geibel, Frank Steglich

    Journal of the Physical Society of Japan   73 ( 1 )   194 - 197   2004.1

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    DOI： 10.1143/jpsj.73.194

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  • Gapless Magnetic and Quasiparticle Excitations due to the Coexistence of Antiferromagnetism and Superconductivity in CeRhIn5: A Study of 115In NQR under Pressure Reviewed

    S. Kawasaki, T. Mito, Y. Kawasaki, G.-q. Zheng, Y. Kitaoka, D. Aoki, Y. Haga, Y. Ōnuki

    Physical Review Letters   91 ( 13 )   2003.9

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    DOI： 10.1103/physrevlett.91.137001

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  • Anisotropic Spin Fluctuations in Heavy-Fermion Superconductor CeCoIn5: In-NQR and Co-NMR Studies Reviewed

    Yu Kawasaki, Shinji Kawasaki, Mitsuharu Yashima, Takeshi Mito, Guo-qing Zheng, Yoshio Kitaoka, Hiroaki Shishido, Rikio Settai, Yoshinori Haga, Yoshichika Ōnuki

    Journal of the Physical Society of Japan   72 ( 9 )   2308 - 2311   2003.9

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    DOI： 10.1143/jpsj.72.2308

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  • Unconventional superconductivity in ferromagnetic UGe2: a73Ge nuclear magnetic resonance/nuclear quadrupole resonance study Reviewed

    H Kotegawa, S Kawasaki, A Harada, Y Kawasaki, K Okamoto, G-q Zheng, Y Kitaoka, E Yamamoto, Y Haga, Y Onuki, K M Itoh, E E Haller

    Journal of Physics: Condensed Matter   15 ( 28 )   S2043 - S2046   2003.7

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    DOI： 10.1088/0953-8984/15/28/323

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  • Unconventional superconductivity in CeIn3: 115In-NQR study under pressure Reviewed

    Shinji Kawasaki, Yu Kawasaki, Takeshi Mito, Guo-qing Zheng, Yoshio Kitaoka, Shingo Araki, Rikio Settai, Yoshichika Ōnuki

    Physica C: Superconductivity   388-389   541 - 542   2003.5

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    DOI： 10.1016/s0921-4534(02)02732-6

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  • Magnetism and superconductivity in CeRhIn5 under chemical and hydrostatic pressures Reviewed

    G.-q.Zheng, S. kawasaki, N. Yamaguchi, K. Tanabe, T. Mito, H. Kan, Y. Kitaoka, Y. Haga, D.Aoki, Y. Onuki, J. L. Sarrao, J. D. Thompson

    Physica B: Condensed Matter   329-333   450 - 451   2003.5

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    DOI： 10.1016/s0921-4526(02)02001-x

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  • Coexistence of Antiferromagnetism and Superconductivity near the Quantum Criticality of the Heavy-Fermion Compound CeRhIn5 Reviewed

    T. Mito, S. Kawasaki, Y. Kawasaki, G. -q. Zheng, Y. Kitaoka, D. Aoki, Y . Haga, Y. Ōnuki

    Physical Review Letters   90 ( 7 )   2003.2

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    DOI： 10.1103/physrevlett.90.077004

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  • Unconventional Superconductivity and Quasi-2D Magnetic Fluctuations in Ce(Ir,Rh)In5 Reviewed International journal

    G.-q. Zheng, K. Tanabe, S. Kawasaki, H. Kan, Y. Kitaoka, D. Aoki, Y. Haga, Y. Ōnuki

    Acta Physica Polonica B   34   435 - 438   2003

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  • Magnetic Properties of CeRhIn5 Under Pressure Probed by 115In-NQR Reviewed International journal

    S. Kawasaki, T. Mito, G.-q. Zheng, Y. Kawasaki, Y. Kitaoka, D. Aoki, Y. Haga, Y. Ōnuki

    Acta Physica Polonica B   34   419 - 422   2003

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  • 115In-NQR evidence for unconventional superconductivity in CeIn3 under pressure Reviewed

    S. Kawasaki, T. Mito, Y. Kawasaki, G.-q. Zheng, Y. Kitaoka, H. Shishido, S. Araki, R. Settai, Y. Ōnuki

    Physical Review B   66 ( 5 )   2002.8

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    DOI： 10.1103/physrevb.66.054521

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  • Coexistence of antiferromagnetism and superconductivity in heavy-fermion systems Reviewed

    Y Kitaoka, Y Kawasaki, T Mito, S Kawasaki, G.-q Zheng, K Ishida, D Aoki, Y Haga, R Settai, Y Ōnuki, C Geibel, F Steglich

    Journal of Physics and Chemistry of Solids   63 ( 6-8 )   1141 - 1146   2002.6

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    DOI： 10.1016/s0022-3697(02)00133-6

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  • Systematic NQR study of the pressure-induced transition from antiferromagnetic to superconducting state in CeRhIn5 Reviewed

    Takeshi Mito, Shinji Kawasaki, Guo-qing Zheng, Yu Kawasaki, Kenji Ishida, Yoshio Kitaoka, Dai Aoki, Yoshinori Haga, Yoshichika Ōnuki

    Physica B: Condensed Matter   312-313   16 - 18   2002.3

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    DOI： 10.1016/s0921-4526(01)01157-7

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  • Evolution of the Magnetism and Superconductivity in CeRhIn5under Pressure:115In-NQR Study Reviewed

    Shinji Kawasaki, Takeshi Mito, Guo-qing Zheng, Yu Kawasaki, Kenji Ishida, Yoshio Kitaoka, Dai Aoki, Yoshinori Haga, Yoshichika Ōnuki

    Journal of the Physical Society of Japan   71 ( Suppl )   282 - 284   2002.1

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    DOI： 10.1143/jpsjs.71s.282

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  • Anisotropic Magnetic Fluctuations and Unconventional Superconductivity in the Layered Heavy Fermion Compound CeIrIn5 Reviewed

    Guo-qing Zheng, Kenji Tanabe, Shinji Kawasaki, Yoshio Kitaoka, Dai Aoki, Yoshinori Haga, Yoshichika Ōnuki

    Journal of the Physical Society of Japan   71 ( Suppl )   279 - 281   2002.1

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    DOI： 10.1143/jpsjs.71s.279

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  • Pressure-temperature phase diagram of antiferromagnetism and superconductivity in CeRhIn5 and CeIn3: 115In−NQR study under pressure Reviewed

    S. Kawasaki, T. Mito, G.-q. Zheng, C. Thessieu, Y. Kawasaki, K. Ishida, Y. Kitaoka, T. Muramatsu, T. C. Kobayashi, D. Aoki, S. Araki, Y. Haga, R. Settai, Y. Ōnuki

    Physical Review B   65 ( 2 )   2001.12

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    DOI： 10.1103/physrevb.65.020504

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  • Pressure-induced anomalous magnetism and unconventional superconductivity in CeRhIn5: 115In-NQR study under pressure Reviewed

    T. Mito, S. Kawasaki, G.-q. Zheng, Y. Kawasaki, K. Ishida, Y. Kitaoka, D. Aoki, Y. Haga, Y. Onuki

    Physical Review B   63 ( 22 )   2001.5

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    DOI： 10.1103/physrevb.63.220507

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  • Unique Spin Dynamics and Unconventional Superconductivity in the Layered Heavy Fermion Compound CeIrIn5 : NQR Evidence Reviewed

    G.-q. Zheng, K. Tanabe, T. Mito, S. Kawasaki, Y. Kitaoka, D. Aoki, Y. Haga, Y. Onuki

    Physical Review Letters   86 ( 20 )   4664 - 4667   2001.5

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    DOI： 10.1103/physrevlett.86.4664

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  • In-NQR study of CeIn3 under pressure Reviewed

    C Thessieu, K Ishida, S Kawasaki, T Mito, Y Kawasaki, G.-q Zheng, Y Kitaoka, Y Onuki

    Physica B: Condensed Matter   281-282   9 - 11   2000.6

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    DOI： 10.1016/s0921-4526(99)01170-9

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▼display all

MISC

  • 大きいフェルミ面と量子臨界点の協奏が生み出す奇妙な超伝導 Invited Reviewed

    川崎慎司, 鄭国慶

    日本物理学会誌   77 ( 6 )   321   2022.6

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    Authorship：Lead author,　Corresponding author   Language：Japanese  

    DOI： 10.11316/butsuri.77.6_361

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  • 銅酸化物高温超伝導体における擬ギャップと磁場誘起電荷密度波- Bi2Sr2-xLaxCuO6+δの場合- Invited Reviewed

    川崎慎司, 鄭国慶

    日本物理学会誌   73 ( 8 )   558   2018.8

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    DOI： 10.11316/butsuri.73.8_558

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Presentations

  • 最適ドープBi2201超伝導体におけるひずみ誘起電荷密度波秩序 : 一軸ひずみ下NMR

    川崎慎司

    京都大学基礎物理学研究所研究会「超伝導研究の発展と広がり」  2023.12.20 

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    Event date： 2023.12.20 - 2023.12.22

    Presentation type：Oral presentation (general)  

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  • 単層型銅酸化物Bi2201超伝導体の一軸ひずみ下NMR

    川崎慎司

    東北大学金属材料研究所 材料科学国際共同利用・共同研究拠点ワークショップ, 強磁場NMR 研究会：20 T 超定常強磁場を用いたNMR による物性研究  2023.12.11 

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    Event date： 2023.12.11 - 2023.12.12

    Presentation type：Oral presentation (general)  

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  • Charge-density-wave order in single-layered Bi$_2$Sr$_{2-x}$La$_x$CuO$_{6+\delta}$ superconductor Invited

    S. Kawasaki, D. Kamijima, M. Kitahashi, Z. Li, C. T. Lin, P. L. Kuhns, A. P. Reyes, Guo-qing Zheng

    Spectroscopies in Novel Superconductors (SNS2019)  2019.6.21 

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    Event date： 2019.6.16 - 2019.6.21

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • Charge-Density-Wave Order and Pseudogap in Single Layered Bi$_2$Sr$_{2-x}$La$_x$CuO$_{6+\delta}$ Superconductor」

    S. Kawasaki, Z. Li, M. Kitahashi, D. Kamijima, M. Ito, C. T. Lin, P. L. Kuhns, A. P. Reyes, Guo-qing Zheng

    12th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (M2S-2018)  2018.8.23 

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    Event date： 2018.8.19 - 2018.8.24

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  • Doping dependence of the charge density wave order in single layered Bi$_2$Sr$_{2-x}$La$_x$CuO$_{6+\delta}$ superconductors revealed by high field NMR Invited

    Shinji Kawasaki

    International Symposium on Frontier of Superconductivity Research (VI)-NMR and $\mu$SR on Unconventional Superconductors-  2016.10.27 

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    Event date： 2016.10.26 - 2016.10.29

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  • 銅酸化物高温超伝導体Bi2201における磁場誘起CDW Invited

    川崎慎司

    金属材料研究所強磁場超伝導材料研究センター研究会 「20テスラ超強磁場NMRによる物性研究２」  2015.11.10 

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    Event date： 2015.11.10 - 2015.11.11

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • 銅酸化物高温超伝導体Bi2201の擬ギャップと超伝導 Invited

    川崎慎司

    金属材料研究所強磁場超伝導材料研究センター研究会 「20テスラ超強磁場NMRによる物性研究」 

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    Event date： 2013.11.18 - 2013.11.19

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • NMR/NQR study of high-$T_c$ cuprate and iron pnictide Invited

    Shinji Kawasaki

    International Symposium on Physics and Chemistry of Novel Superconductors and Related Materials 

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    Event date： 2012.10.1 - 2012.10.3

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  • Superconductivity in CeIrIn$_5$ under chemical and hydrostatic pressures: $^{115}$In-NQR study Invited

    Shinji Kawasaki

    Joint Workshop on NQP-skutterudites and NPM in multi-approach  2005.11 

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    Event date： 2005.11.21 - 2005.11.24

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • 単層型銅酸化物Bi$_2$Sr$_{2-x}$La$_x$CuO$_6$超伝導体における一軸ひずみ下 NMR

    川崎慎司

    高温超伝導フォーラム第10回会合  2023.9.25 

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  • Bi2201 の一軸ひずみ下NMR

    川崎慎司

    第一回 核磁気共鳴法を用いた物性研究討論会  2023.9.25 

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  • 銅酸化物高温超伝導体Bi$_2$Sr$_{2-x}$La$_x$CuO$_6$の一軸ひずみ下NMR

    佃菜桜, 川崎慎司, Chengtian Lin, 鄭国慶

    日本物理学会2023年春季大会  2023.3.25 

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  • Charge-Density-Wave order and fluctuations in high $T_{\rm c}$ cuprates

    Shinji Kawasaki

    Mini Symposium on Recent Progress in High-temperature and Unconventional Superconductivity  2022.6.8 

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  • Possible odd-frequency gapless superconductivity in CeRh$_{0.5}$Ir$_{0.5}$In$_5$

    Shinji Kawasaki

    Progress in Superconductivity Research– RIIS Mini-Workshop – hosted by Research Institute for Interdisciplinary Science and Department of Physics, Okayama University, Japan  2022.5.13 

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  • 重い電子系反強磁性超伝導体CeRh$_{0.5}$Ir$_{0.5}$In$_5$における局在・遍歴転移とギャップレス超伝導

    川崎慎司, 岡利英, 反り目章, 小亀雄司, 上本和宏, 俣野和明, J. Guo, S. Cai, Liling Sun, J. L. Sarrao, J, D. Thompson, 鄭国慶

    日本物理学会第76回年次大会  2021.3.14 

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  • Bi2201における磁場誘起電荷密度波と擬ギャップ Invited

    川崎慎司

    日本物理学会第73回年次大会 (領域８シンポジウム(一般)「超伝導体における新奇な対称性の破れ」  2018.3.24 

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  • Doping-enhanced antiferromagnetism in Ca$_{1-x}$La$_x$FeAs$_2$ revealed by $^{75}$As nuclear magnetic resonance and nuclear quadrupole resonance Invited

    Shinji Kawasaki

    2015.12.10 

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  • 銅酸化物高温超伝導体における磁場誘起電荷秩序と擬ギャップ状態 Invited

    川崎慎司

    CMRC$^{plus}$研究会 「量子ビームによる銅酸化物超伝導体研究の最前線」  2015.11.11 

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  • 核磁気共鳴(NMR)法を用いた最近の超伝導研究について-高温超伝導研究の現状- Invited

    川崎慎司

    2013年度 応用物理・物理系学会中国四国支部合同学術講演会(日本物理学会 四国支部 第１回 チュートリアル講演会)  2013.7.28 

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  • 量子臨界点由来の新奇超伝導相の核磁気共鳴法による研究 Invited

    川崎慎司

    日本物理学会第67回年次大会 (領域６，８合同シンポジウム「奇周波数クーパー対の物理」)  2012.3.25 

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  • 擬ギャップの基底状態とそのドーピング依存性：超強磁場下NMR Invited

    川崎慎司

    日本物理学会2011年秋季大会 (領域８シンポジウム「高温超伝導体研究の最近の進展：波数空間と実空間プローブで探る擬ギャップと超伝導ギャップの関係」)  2011.9.23 

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  • ReFeAsOF (Re=La,Pr)の２ギャップ超伝導 Invited

    川崎慎司

    研究会「鉄ニクタイド物質系における超伝導ペア対称性と超伝導状態」  2009.1.24 

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  • 重い電子系超伝導体PrOs$_4$Sb$_{12}$の圧力下Sb-NQR による研究 Invited

    川崎慎司

    日本物理学会 中国支部・四国支部 2007 年度 支部学術講演会  2007.8.4 

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  • Novel Superconductivity and Magnetism in CeIn$_3$ and Ce115 Systems: a Study of $^{115}$In-NQR Under Pressure Invited

    Shinji Kawasaki

    2004.9.12 

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Awards

  • APS Outstanding Referee

    2023.2   American Physical Society  

    Shinji Kawasaki

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  • 理学部教育貢献賞

    2014.3   岡山大学理学部  

    川崎慎司

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  • 岡山大学 学長表彰「若手トップリサーチャー研究奨励賞」

    2011.3   岡山大学  

    川崎慎司

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Research Projects

  • 精密一軸結晶ひずみ制御による非従来型超伝導と背景秩序/揺らぎの起源解明

    Grant number：23K03323  2023.04 - 2026.03

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    川崎 慎司

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    Grant amount：\4680000 （ Direct expense: \3600000 、 Indirect expense：\1080000 ）

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  • 一軸ひずみ応答による銅酸化物高温超伝導と背景電荷密度波秩序/揺らぎの起源解明

    2022.01 - 2022.12

    公益財団法人村田学術振興財団  第38回（2022年度）研究助成

    川崎慎司

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    Authorship：Principal investigator 

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  • Physics of Spin-triplet superconductivity

    Grant number：19H00657  2019.04 - 2023.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    鄭 国慶, 俣野 和明, 川崎 慎司, 市岡 優典

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    Grant amount：\44590000 （ Direct expense: \34300000 、 Indirect expense：\10290000 ）

    （１）強磁性スピンゆらぎが存在するスピン三重項超伝導体K2Cr3As3の高品質単結晶の作製に成功した。
    （２）K2Cr3As3の関連物質Cs2Cr3As3において、１K以下の低温まで磁化率測定を行い、この物質の本質的な超伝導転移が1.2Kで起こるが、磁場をc軸に平行にかけると、フィラメント的な超伝導が現れることを明らかにした。
    （３）カゴメ構造をもつ超伝導体CsV3Sb5における電荷密度波の構造がダビット星型であることを明らかにした。
    （４）スピン三重項超伝導体CuxBi2Se3において、磁場によってベクトル秩序変数の制御に成功した。スピン三重項超伝導体CuxBi2Se3のベクトル秩序変数の方向が結晶軸からずれることを発見した。また、その理由はフォノンとの結合であることを明らかにした。
    （５）スピン三重項超伝導体CuxBi2Se3の超伝導軌道関数（ギャップ対称性）がpxの対称性を持つことを明らかにした。

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  • Nuclear Magnetic Resonance study of the charge density wave order in the Cu oxide superconductor

    Grant number：19K03747  2019.04 - 2022.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    Kawasaki Shinji

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    Grant amount：\4290000 （ Direct expense: \3300000 、 Indirect expense：\990000 ）

    We have conducted nuclear magnetic resonance (NMR) experiments to elucidate the origin of the novel charge density wave order in Cu-oxide (cuprate) superconductor, which is the most promising candidate for room-temperature superconductivity among known superconductors. From systematic measurements, we have obtained new findings that indicate the importance of "charge fluctuation" in addition to spin fluctuation, which has been believed to be the origin of high-temperature superconductivity. Based on our results, further developments of physics of the cuprate superconductivity in theoretical and experimental studies focusing on charge fluctuations are expected. Another purpose of the study was to introduce uniaxial strain, a new external parameter that has recently been the focus of much attention in condensed matter physics, into NMR experiments, and we succeeded in developing an laboratory-made piezoelectric uniaxial strain cell during the research period.

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  • 単層型銅酸化物高温超伝導体における電荷密度波・擬ギャップ・超伝導の起源解明

    2018.10 - 2019.09

    住友電工グループ社会貢献基金  2018年度学術・研究助成

    川崎慎司

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    Authorship：Principal investigator 

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  • NMR study on novel superconductivity in materials with special structures

    Grant number：16H04016  2016.04 - 2019.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Zheng Guo-qing

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    Grant amount：\17810000 （ Direct expense: \13700000 、 Indirect expense：\4110000 ）

    The purpose of this project is to search for novel superconducting state in materials with triangular or hexagonal lattices. Some of the materials we studied lack spatial inversion center, and thus anti-symmetric spin-orbit coupling is enhanced which can induce spin-triplet superconducting state. Others have van Hove singularity in the electronic band structure which is favored by unconventional superconducting states. We performed nuclear magnetic resonance (NMR) measurements to study the temperature, magnetic-field, and crystal axis dependence of the spin-lattice relaxation rate and Knight shift. Through these measurements, we have revealed the exotic properties of several materials.

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  • NMR study on unconventional superconductivity and novel quantum phenomena in strongly correlated electron systems under extreme condition

    Grant number：25400374  2013.04 - 2016.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    Kawasaki Shinji, ZHENG Guo-qing

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    Grant amount：\4810000 （ Direct expense: \3700000 、 Indirect expense：\1110000 ）

    (1)NMR study of Sr2VFeAsO3 under high pressure; In iron based high temperature superconductor Sr2VFeAsO3, we found an antiferromagnetic order above Tc and obtained novel pressure-temperature phase diagram of superconductivity and antiferromagnetism. (2)High temperature NMR study in SrPt2As2 superconductor; We found multiple charge density wave orders in SrPt2As2, which coexist with superconductivity by NMR measurement up to 600K. (3)High pressure NQR and resistivity measurements on CeRhIrIn5; We found that a unconventional superconducting state is induced near the antiferromgnetic quantum critical point in CeRhInIn5. (4)NMR study in Ce1-xLaxFeAs2; We found electron doping enhanced antiferromagnetism and its coexistence with high temperature superconductivity in Ce1-xLaxFeAs2. (5) High field NMR study in high Tc cuprate; By applying high magnetic field up to 45T, we found a CDW order is induced after suppressing superconductivity in underdoped cuprate.

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  • 重い電子系における量子臨界点由来の新奇超伝導相の核磁気共鳴法による研究

    Grant number：23102717  2011.04 - 2013.03

    日本学術振興会  科学研究費助成事業  新学術領域研究(研究領域提案型)

    川崎 慎司

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    Grant amount：\8840000 （ Direct expense: \6800000 、 Indirect expense：\2040000 ）

    本研究計画は、重い電子系における反強磁性磁気「量子臨界点」に着目し、低温高圧下核磁気共鳴(NMR)/核四重極共鳴(NQR)測定を通じて量子臨界点と非従来型超伝導の関連を調べている。平成24年度は、本研究計画最終年度であり、重い電子系反強磁性超伝導体CeRh0.5Ir0.5In5の低温高圧下NQR実験を通じ、量子臨界点と量子臨界点における超伝導ギャップ構造に注目し、その圧力相図を完成させた。
    具体的には、CeRh0.5Ir0.5In5におけるIn-NQRスピン格子緩和時間（T1）の常伝導状態の温度依存性から、反強磁性揺らぎが絶対零度に向けて発散する圧力、つまり量子臨界点がPc＝1.2GPaであることがわかった。同時に、圧力下のTc測定から、CeRh0.5Ir0.5In5の超伝導転移温度が量子臨界点で最大値Tc＝1.4Kを示すことがわかった。これは量子臨界点近傍の反強磁性スピン揺らぎがTc上昇を助けていることを示す直接的な証拠である。
    また、3He冷凍機を用いた極低温のT1測定から、量子臨界点で超伝導ギャップ内の残留状態密度が極めて大きくなることを見出した。
    このことは、量子臨界点でTc最大となる超伝導は、ギャップレス超伝導であることを示す。このようなTc増大を伴うギャップレス超伝導は、過去に知られている超伝導現象では説明出来ない全く新しい現象であり、重い電子系超伝導発現機構解明に向け、新たなきっかけを与える重要な成果であると考えられる。

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  • NMR study of unconventional superconductivity in strongly correlated electron systems

    Grant number：22740232  2010 - 2012

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    KAWASAKI Shinji, ZHENG Guo-qing

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    Grant amount：\4290000 （ Direct expense: \3300000 、 Indirect expense：\990000 ）

    1. NMR study of high-Tccuprate in very high magnetic field; by applying high magnetic field of 45 T, we revealed the pseudogap ground state for high Tc cuprate after suppressing superconductivity for the first time.
    2. NMR study of magnetism and superconductivity in iron-pnictide superconductors; we found the phase diagram of iron-pnictide superconductor is similar with high-Tccuprate indicating that magnetism helps to raise Tcin iron-pnictide as well as cuprate.

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  • PrOs4Sb12における多重極揺らぎと重い電子超伝導の核磁気共鳴法による研究

    Grant number：21102514  2009 - 2010

    日本学術振興会  科学研究費助成事業  新学術領域研究(研究領域提案型)

    川崎 慎司

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    Grant amount：\9100000 （ Direct expense: \7000000 、 Indirect expense：\2100000 ）

    (1)充填スクッテルダイト化合PrOs_4Sb_<12>の温高圧下Sb-NQR法による研究
    充填スクッテルダイト化合物PrOs_4Sb_<12>の重い電子超伝導と四重極揺らぎとの関連を低温高圧下核磁気共鳴法によって調べるために、世界初となる5万気圧を超えるSb-NQR用対向アンビル型圧力セルの開発を行った。この圧力セルはこれまでの高圧下核磁気共鳴法の標準的加圧装置であるピストンシリンダー型(最大圧力3万気圧未満)に比べ、核磁気共鳴には十分な量の試料空間を備えるものである。平成22年度において、室温でおよそ6万気圧の加圧テストに成功した。今後未踏の5万気圧下NMR実験によって、本物質の電子状態解明のみならず、他の系における様々な新しい知見が得られると期待される。
    (2)新奇Fe系圧力誘起超伝導体CaFe_2As_2の量子臨界現象と非従来型超伝導に関する研究
    鉄系超伝導体は2008年に発見された全く新しい高温超伝導体であり、その超伝導状態や発現機構は不明である。本研究課題では世界に先駆けて単結晶CaFe_2As_2(P_c～5kbar,T_c～5K)を用いた系統的な低温高圧下As-NMR/NQR実験を行った。その結果、超伝導のクーパー対の対称性が、加圧によってギャップレス超伝導から、d波的な超伝導へと転移する(圧力依存性を示す)ことがわかった。このことは本物質の超伝導が、「量子臨界点」近傍で発現していることを示す。また、常伝導状態の電子状態の圧力依存性から、鉄のd電子による多バンド構造由来のスピン揺らぎが超伝導発現に重要な役割を果たしていることを明らかにした。本研究成果は、鉄系超伝導が重い電子系超伝導と普遍的な性質を持つことを示すものであり、量子臨界点を通じた系統的な理解が今後期待される。

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  • Novel Physics of non-centrosymmetric superconductors

    Grant number：20244058  2008 - 2011

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    ZHENG Guo-qing, INADA Yoshihiko, KAWASAKI Shinji, ICHIOKA Masanori, SAKURAI Yoshiharu

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    Grant amount：\47320000 （ Direct expense: \36400000 、 Indirect expense：\10920000 ）

    We have grown polycrystal samples of non-centrosymmetric superconductors Li_2(Pt_<1-x> Pd_x)_3B and studied the evolution of the superconducting state by NMR. We found that the superconducting state changes abruptly at x~ 0. 8. By analyzing the crystal structure, we found that the Pt(Pd) B_6 tilts abruptly beyond x~ 0. 8, which enhances the spin-orbit coupling and is responsible for the change in the superconducting state properties. We have also studied other non-centrosymmetric superconductors such as Mg_10Ir_19B_16 and Re_7B_3. The results also suggest that the local structure distortion is effective in enhancing the degree of inversion symmetry-breaking.

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  • Electrochemical oxidation and electronic structure of transition-metal dioxides

    Grant number：19740201  2007 - 2008

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    MOTOHASHI Teruki, YAMAUCHI Hisao, KARPPINEN Maarit, KANNO Kanno, ZHENG Guo-qing

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    Grant amount：\3340000 （ Direct expense: \3100000 、 Indirect expense：\240000 ）

    本研究では、電子相関効果やスピンフラストレーション効果が期待される層状遷移金属二酸化物の電気化学的強酸化合成とその電子構造の解明を目的とした。特に、巨大熱起電力や超伝導の発見により注目を集めている層状コバルト酸化物の一種であるLixCoO2系について、Li量 (x) を幅広く制御した高品質試料の合成と物性評価を行い、Li量 (x) をパラメータとする電子状態図を構築した。

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  • 圧力誘起磁気量子相転移と重い電子系超伝導の極低温高圧下NMR/NQR法による研究

    Grant number：17740225  2005 - 2007

    日本学術振興会  科学研究費助成事業  若手研究(B)

    川崎 慎司

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    Grant amount：\3500000 （ Direct expense: \3500000 ）

    ・重い電子系充填スクッテルダィト化合物PrOs_<4>Sb_<12>の超伝導相図の確立
    PrOs_<4>Sb_<12>の超伝導はその4f電子の結晶場励起と密接に関連していることが多くの実験事実から示唆されていた。この結晶場を実験的に制御(加圧)し、超伝導との関連を調べることが期待される。本研究では、インデンター型圧力セルを核磁気共鳴測定に新たに導入し、これまでは微視的測定では到達が困難であった3GPa以上でのSb-NQR測定に成功し、3GPaを超える圧力下でこの物質の結晶場励起に関する情報を世界で初めて報告した。またPrOs_<4>Sb_<12>の超伝導と、結晶場の関係について微視的視点から圧力相図を明らかにした。
    ・重い電子系反強磁性体Celn_3の圧力相図の確立。
    重い電子系超伝導はいわゆる量子臨界点近傍(絶対零度での二次相転移点近傍)で発現することが広く信じられている。本研究では詳細な低温高圧下NQR測定から、重い電子系化合物Celn_3の反強磁性一常磁性量子相転移は一次相転移であることを明らかにし、圧力誘起超伝導はその一次相転移点近傍で誘起される新奇な量子臨界現象を媒介として発現するという、これまでの常識を覆す全く新しい事実を見出した。
    ・Na_<x>CoO_2・yH_2O超伝導の圧力効果。
    層状Co酸化物超伝導体Na_<x>CoO_2・yH_2Oは、同じ3d電子を舞台とする銅酸化物高温超伝導体との系統性からも世界的に注目されている。本研究では低温高圧下NMR/NQR測定からNa_<x>CoO_2・yH_2Oの超伝導の圧力相図を確立し、圧力下におけるこの物質の異方的超伝導と電子相関の関連を世界で初めて明らかにした。

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  • 圧力誘起重い電子系超伝導体の極低温高圧下NMR/NQR法による磁性と超伝導の研究

    Grant number：03J03938  2003 - 2004

    日本学術振興会  科学研究費助成事業  特別研究員奨励費

    川崎 慎司

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    Grant amount：\1900000 （ Direct expense: \1900000 ）

    本研究では、加圧によっ,て重い電子系の磁性と超伝導の相関、そして超伝導発現機構の解明をめざしている。
    また、重い電子系超伝導体CeIrIn_5の圧力下NQR測定によって、重い電子系化合物における新たな超伝導発現機構の存在を示唆する結果を得た。
    具体的な成果は以下の通り。
    1.重い電子系反強磁性圧力誘起超伝導体CeIn_3の圧力誘起反強磁性-常磁性転移が一次相転移であり、超伝導はその一次転移近傍で発現することを明らかにした。電気抵抗測定から強く示唆されていた量子臨界点の存在を否定する初めての結果を得た。この結果は、これまで量子臨界点近傍の強い磁気揺らぎによって誘起されていると考えられてきた重い電子系超伝導発現機構に、一次相転移という新たなキーワードを付与する重要な結果である。また、強磁性圧力誘起超伝導体UGe_2においても強磁性-常磁性転移が一次相転移であることを見出し、一次の磁気相転移が超伝導発現に果たす役割が、重い電子系において系統的に理解される可能性を示唆する。
    2.常圧でT_c=0.4 Kの超伝導体であるCeIrIn_5は、IrをRhで置換すると、負の圧力効果から、反強磁性秩序が誘起され、かつ超伝導転移温度(T_c)が上昇することが報告されており[1]、Ce115系における超伝導が磁気揺らぎによって誘起されていることが強く示唆される。一方CeIrIn_5を加圧する(磁性から遠ざける)ことでも超伝導転移温度は上昇する[2-4]。この時常伝導状態は、T_cが増大するにも関わらず、核磁気緩和率の温度依存性からフェルミ液体状態であることを見出した。つまり高圧下のCeIrIn_5の超伝導は磁気揺らぎとは異なる起源で誘起されていることがわかった。このことは、Ce115系、ひいては重い電子系超伝導体において、磁気揺らぎと、もう一つ異なる超伝導発現機構が存在するというこれまでにない新たな重要な知見を得た。
    [1] G.-q. Zheng, Phys.Rev.B 70,014511(2004). [2] T.Muramatsu et al.,Physica C 388-389,539(2003).[3] R.Borth et al.,Physica B 312-313,136(2002). [4] S.Kawasaki et al.,Phys.Rev.Lett. 94,037007(2005).

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