2012 Fiscal Year Final Research Report
Discovery and Clarification of Exotic Superconducting Phases
| Project Area | Emergence of Heavy Electrons and Their Ordering |
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| Project/Area Number |
20102006
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| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | Kyoto University |
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Principal Investigator |
ISHIDA Kenji 京都大学, 大学院・理学研究科, 教授 (90243196)
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| Co-Investigator(Kenkyū-buntansha) |
MATSUDA Yuji 京都大学, 大学院・理学研究科, 教授 (50199816)
SATO Noriaki 名古屋大学, 大学院・理学研究科, 教授 (30170773)
KAMBE Shinsaku 独立行政法人日本原子力開発機構, 先端基礎研究センター, 研究主席 (40224886)
IZAWA Koichi 東京工業大学, 大学院・理工学研究科, 准教授 (90302637)
FURUKAWA Hazuki お茶の水大学, 大学院・人間文化創成科学研究科, 教授 (70281649)
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| Co-Investigator(Renkei-kenkyūsha) |
NISHIDA Nobuhiko 東京工業大学, 大学院・理工学研究科, 教授 (50126140)
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| Project Period (FY) |
2008 – 2012
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| Keywords | 強相関電子系 / 重い電子 / 人工格子 |
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| Research Abstract |
During last 5 years, the research group studied mainly to clarify the superconducting pairing state and mechanism on unconventional superconductors realized in the strongly correlated electron systems. In addition, quantum critical phenomena observed in various heavy-electron (HF) systems were studied. Main results are as follows,
(1)Two-dimensional HF state created with superlattice structure, in which quantum critical phenomena and strong-coupling superconductivity are observed.
(2)(1)Coexistence of ferromagnetism and superconductivity, (2)self-induced vortex state, (3)Superconductivity induced by Ising-type ferromagnetic fluctuations are suggested in UCoGe.
(3)Superconducting-gap structure determined by thermal conductivity measurement
(4)Breaking four-hold symmetry in the ``hidden-ordered’’ state on Uru_2Si_2
(5)Quantum criticality in Au-Al-Yb quasi-crystal
(6)Origin of magnetic instability in Usn_3 clarified with spin-dynamics properties
(7)Ferromagnetic quantum criticality in heavy-fermion Ce(Ru_<1-x>Fe_x)PO with a two-dimensional structure
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Research Products
(28 results)
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[Journal Article] Anomalous Upper Critical Field in CeCoIn_5/YbCoIn_5 Superlattices with Rashba-type Heavy Fermion Interface2012
Author(s)
S. K. Goh, Y. Mizukami, H. Shishido, D. Watanabe, S. Yasumoto, M. Shimozawa, M. Yamashita, T. Terashima, Y. Yanase, T. Shibauchi, A. I. Buzdin, and Y. Matsuda
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Journal Title
Phys. Rev. Lett
Volume: 109
Pages: 157006
DOI
Peer Reviewed
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[Journal Article] Superconductivity Induced by Longitudinal Ferromagnetic Fluctuations in UCoGe2012
Author(s)
T. Hattori, Y. Ihara, Y. Nakai, K. Ishida, Y. Tada, S. Fujimoto, N. Kawakami, E. Osaki, K. Deguchi, N. K. Sato, and I. Satoh
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Journal Title
Physical Review Letter
Volume: 108
Pages: 066403
DOI
Peer Reviewed
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[Journal Article] Cyclotron Resonance in the Hidden-Order Phase of Uru_2Si_22012
Author(s)
S. Tonegawa, K. Hashimoto, K. Ikada, Y.-H. Lin, H. Shishido, Y. Haga, T. D. Matsuda, E. Yamamoto, Y. Onuki, H. Ikeda, Y. Matsuda, and T. Shibauchi
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Journal Title
Phys. Rev. Lett
Volume: 109
Pages: 036401
DOI
Peer Reviewed
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