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2008 Fiscal Year Final Research Report

Physical properties of exotic superconductors

Research Project

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Project/Area Number 16076204
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionThe University of Tokyo

Principal Investigator

TAKIGAWA Masashi  The University of Tokyo, 物性研究所, 教授 (10179575)

Co-Investigator(Kenkyū-buntansha) MATSUDA Yuji  京都大学, 大学院・理学研究科, 教授 (50199816)
TAKAGI Hidenori  東京大学, 大学院・新領域創成科学研究科, 教授 (40187935)
YAMADA Kazuyoshi  東北大学, 金属材料研究所, 教授 (70133923)
KADONO Ryousuke  高エネルギー加速器研究機構, 物質構造科学研究所, 教授 (10194870)
Project Period (FY) 2004 – 2008
Keywords銅酸化物超伝導体 / 重い電子超伝導体 / 鉄系超伝導体 / 異方的超伝導体 / 核磁気共鳴 / ミュオンスピン回転 / 中性子散乱 / 輸送現象
Research Abstract

超伝導体の微視的な性質解明に威力を発揮するミュオンスピン回転や中性子散乱に関して、新しい方法を実現する装置や従来の性能を大幅に改善する装置を開発した。これらに加えて、核磁気共鳴や輸送現象の測定により、超伝導の新しいメカニズムや電荷やスピンの秩序と関連した新規な超伝導状態を見出した。更に、さまざまな物質を合成する中で、数多くの新しい超伝導体を発見した。

  • Research Products

    (24 results)

All 2009 2008 2007 2006 2005 2004 Other

All Journal Article (20 results) (of which Peer Reviewed: 20 results) Presentation (4 results)

  • [Journal Article] Thermal-transport measurements in a quantum spin-liquid state of the frustrated triangular magnet k-(BEDT-TTF)_2Cu_2(CN)_32009

    • Author(s)
      M. Yamashita, N. Nakata, Y. Kasahara, T. Sasaki, N. Yoneyama, N. Kobayashi, S. Fujimoto, T. Shibauchi, and Y. Matsuda
    • Journal Title

      Nature Physics 5

      Pages: 44-47

    • Peer Reviewed
  • [Journal Article] Microwave Penetration Depth and Quasiparticle Conductivity of PrFeAsO_<1-y> Single Crystals : Evidence for a Full-Gap Superconductor2009

    • Author(s)
      K. Hashimoto, T. Shibauchi, T. Kato, K. Ikada, R. Okazaki, H. Shishido, M. Ishikado, H. Kito, A. Iyo, H. Eisaki, S. Shamoto, and Y. Matsuda
    • Journal Title

      Phys. Rev. Lett. 102

      Pages: 017002-1-4

    • Peer Reviewed
  • [Journal Article] Full Gap Superconductivity in Ba_<0.6>K_<0.4>Fe_2As_2 Probed by Muon Spin Rotation2009

    • Author(s)
      M. Hiraishi, R. Kadono, S. Takeshita, M. Miyazaki, A. Koda, H. Okabe, and J. Akimitsu
    • Journal Title

      J. Phys. Soc. Jpn. 78

      Pages: 023710-1-4

    • Peer Reviewed
  • [Journal Article] Commensurate Itinerant Antiferromagnetism in BaFe_2As_2 : ^<75>As-NMR Studies on a Self-Flux Grown Single Crystal2008

    • Author(s)
      K. Kitagawa, N. Katayama, K. Ohgushi, M. Yoshida and M. Takigawa
    • Journal Title

      J. Phys. Soc. Jpn. 77

      Pages: 114709-1-6

    • Peer Reviewed
  • [Journal Article] Magnetic Dispersion of the Diagonal Incommensurate Phase in Lightly Doped La_<2-x>Sr_xCuO_42008

    • Author(s)
      M. Matsuda, M. Fujita, S. Wakimoto, J. A. Fernandez-Baca, J. M. Tranquada and K. Yamada
    • Journal Title

      Phys. Rev. Lett. 101

      Pages: 197001-1-4

    • Peer Reviewed
  • [Journal Article] Multigap Superconductivity in Sesquicarbides La_2C_3 and Y_2C_32008

    • Author(s)
      S. Kuroiwa, Y. Saura, J. Akimitsu, M. Hiraishi, M. Miyazaki, K. H. Satoh, S. Takeshita and R. Kadono
    • Journal Title

      Phys. Rev. Lett. 100

      Pages: 097002-1-4

    • Peer Reviewed
  • [Journal Article] Quasiparticle interference and superconducting gap in Ca_<2-x>Na_xCuO_2Cl_22007

    • Author(s)
      T. Hanaguri, Y. Kohsaka, J. C. Davis, C. Lupien, I Yamada, M. Azuma, M. Takano, K. Ohishi, M. Ono and H. Takagi
    • Journal Title

      Nature Physics 3

      Pages: 865-871

    • Peer Reviewed
  • [Journal Article] Superconductivity in Rh_2Ga_9 and Ir_2Ga_9 without Inversion Symmetry2007

    • Author(s)
      T. Shibayama, M. Nohara, H. A. Katori, Y. Okamoto, Z. Hiroi, and H. Takagi
    • Journal Title

      J. Phys. Soc. Jpn. 76

      Pages: 073708-1-4

    • Peer Reviewed
  • [Journal Article] Microscopic properties of vortex states in YB_6 probed by muon spin rotation2007

    • Author(s)
      R. Kadono, S. Kuroiwa, J. Akimitsu, A. Koda, K. Ohishi, W. Higemoto , and S. Otani
    • Journal Title

      Phys. Rev. B76

      Pages: 094501-1-11

    • Peer Reviewed
  • [Journal Article] Disappearance of Antiferromagnetic Spin Excitations in Overdoped La_<2-x>Sr_xCuO_42007

    • Author(s)
      S. Wakimoto, K. Yamada, J. M. Tranquada, C. D. Frost, R. J. Birgeneau and H. Zhang
    • Journal Title

      Phys. Rev. Lett. 98

      Pages: 247003-1-4

    • Peer Reviewed
  • [Journal Article] Ni-Impurity Effects on Incommensurate Spin Correlations in the Superconducting Phase of La_<2-x>Sr_xCuO_4 near the Spin-Glass Phase Boundary2007

    • Author(s)
      H. Hikara, S. Ohta, S. Wakimoto, M. Matsuda and K. Yamada
    • Journal Title

      J. Phys. Soc. Jpn. 76

      Pages: 074703-1-6

    • Peer Reviewed
  • [Journal Article] NMR Observation of Rattling Phonons in the Pyrochlore Superconductor KOs_2O_62007

    • Author(s)
      M. Yoshida, K. Arai, R. Kaido, M. Takigawa, S. Yonezawa, Y. Muraoka, and Z. Hiroi
    • Journal Title

      Phys. Rev. Lett. 98

      Pages: 197002-1-4

    • Peer Reviewed
  • [Journal Article] Enhancement of superconductivity and evidence of structural instability in intercalated graphite CaC_6 under high pressure2007

    • Author(s)
      A. Gauzzi, S. Takashima, N. Takeshita, C. Terakura, H. Takagi, N. Emery, C. Herold, P. Lagrange, and G. Loupia
    • Journal Title

      Phys. Rev. Lett. 98

      Pages: 067002-1-4

    • Peer Reviewed
  • [Journal Article] Fulde-Ferr ell-Larkin-Ovchinnikov state in heavy Fermion superconductors2007

    • Author(s)
      Y. Matsuda and H. Shimahara
    • Journal Title

      J. Phys. Soc. Jpn. 76

      Pages: 051005-1-16

    • Peer Reviewed
  • [Journal Article] Compensation of Effective Field in the Field-Induced Superconductor κ-(BETS)_2FeBr_4 Observed by ^<77>Se NMR2006

    • Author(s)
      S. Fujiyama, M. Takigawa, J. Kikuchi, H.-B. Cui, H. Fujiwara, and H. Kobayashi
    • Journal Title

      Phys. Rev. Lett. 96

      Pages: 217001-1-4

    • Peer Reviewed
  • [Journal Article] Nodal structure of unconventional superconductors probed by angle resolved thermal transport measurements2006

    • Author(s)
      Y. Matsuda, K. Izawa and I. Vekhter
    • Journal Title

      J. Phys. Soc. Jpn. 18

      Pages: R705-R752

    • Peer Reviewed
  • [Journal Article] Direct observation of a nonmonotonic dx^2-y^2-wave superconducting gap in the electron doped High-Tc superconductor Pr_<0.89>LaCe_<0.11>CuO_42005

    • Author(s)
      H. Matsui, K. Terashima, T. Sato, T. Takahashi, M. Fujita and K. Yamada
    • Journal Title

      Phys. Rev. Lett. 95

      Pages: 017003-1-4

    • Peer Reviewed
  • [Journal Article] Field-Induced Uniform Antiferromagnetic Order Associated with Superconductivity in Pr_<1-x>LaCe_xCuO_<4-δ>2005

    • Author(s)
      R. Kadono, K. Ohishi, A. Koda, S.R. Saha, W. Higemoto, M. Fujita and K. Yamada
    • Journal Title

      J. Phys. Soc. Jpn. 74

      Pages: 2806-2812

    • Peer Reviewed
  • [Journal Article] An unusual isotope effect in a high-transition-temperature superconductor2004

    • Author(s)
      GH. Gweon, T.Sasagawa, SY. Zhou, J. Graf, H. Takagi, DH. Lee, A. Lanzara
    • Journal Title

      Nature 430

      Pages: 187-190

    • Peer Reviewed
  • [Journal Article] Antiferromagnetism of SrFe_2As_2 studies by signle crystal ^<75>As-NMR

    • Author(s)
      K. Kitagawa, N. Katayama, K. Ohgushi, and M. Takigawa
    • Journal Title

      J. Phys. Soc. Jpn (in press)

    • Peer Reviewed
  • [Presentation] Novel Ordered Phases in the Shastry-Sutherland Spin System SrCu2(BO3)22008

    • Author(s)
      M. Takigawa
    • Organizer
      4th international Conference on Highly Frustrated Magnetism
    • Place of Presentation
      Braunschhweig, ドイツ
    • Year and Date
      20080907-12
  • [Presentation] Exotic Superconducting State Embedded in the Hidden Order of URu_2Si_22008

    • Author(s)
      M. Matsuda
    • Organizer
      American Physical Society, March Meeting
    • Place of Presentation
      New Orleans, アメリカ合衆国
    • Year and Date
      20080310-14
  • [Presentation] Neutron scattering study on dual nature of magnetic excitations in high temperature superconductors2007

    • Author(s)
      K. Yamada
    • Organizer
      8th International Conference on Spectros copies in Novel Superconductors
    • Place of Presentation
      仙台
    • Year and Date
      20070820-24
  • [Presentation] Spin and charge frustrat ion in new Ir and Rh spinel oxides2007

    • Author(s)
      H. Takagi
    • Organizer
      International Conference on Strongly Correlated Electron Systems
    • Place of Presentation
      Houston アメリカ合衆国
    • Year and Date
      20070513-18

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Published: 2010-06-10   Modified: 2016-04-21  

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