2013 Fiscal Year Final Research Report
Two-dimensional superconductivity of heavy fermion by superlattices composed of rare earth intermetallic compounds
Project/Area Number |
23360010
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Applied materials science/Crystal engineering
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Research Institution | Kyoto University |
Principal Investigator |
|
Project Period (FY) |
2011-04-01 – 2014-03-31
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Keywords | 重い電子系 / 超伝導 / 希土類金属間化合物 / MBE / 2次元 / 人工超格子 / 空間反転対称性 / 上部臨界磁場 |
Research Abstract |
We have succeeded to realize the two-dimensional superconductivity of the heavy fermion by using superlattices composed of superconducting CeCoIn5 and non-magnetic metal YbCoIn5. It is revealed that the superconducting transition occurs even in one-unit-cell thick layer of CeCoIn5, and extremely strong coupling superconductivity occurs in the two-dimensional CeCoIn5 layer. In the superlattices, it is suggested that the local inversion symmetry breaking at the interface between CeCoIn5 and YbCoIn5 gives rise to the peculiar angular variation of upper critical field Hc2, which can be interpreted as a strong suppression of the Pauli pair-breaking effect.
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[Journal Article] Controllable Rashba Spin-Orbit Interaction in Artificially Engineered Superlattices Involving Heavy Fermion Superconductor CeCoIn_52014
Author(s)
M.Shimozawa, S.K.Goh, R.Endo, R.Kobayashi, T.Watashige, Y.Mizukami, H.Ikeda, H.Shishido, Y.Yanase, T.Terashima, T.Shibauchi, and Y.Matsuda
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Journal Title
Phys. Rev. Lett.
Volume: 112
Pages: 156404-1-4
DOI
Peer Reviewed
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[Journal Article] Anomalous Upper Critical Field in CeCoIn_5/YbCoIn_5 Superlattices with a 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: 157006-1-5
DOI
Peer Reviewed
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[Journal Article] Extremely strong-coupling superconductivity in artificial two-dimensional Kondo lattices2011
Author(s)
Y.Mizukami, H.Shishido, T.Shibauchi, M.Shimozawa, S.Yasumoto, D.Watanabe, M.Yamashita, H.Ikeda, T.Terashima, H.Kontani, and Y.Matsuda
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Journal Title
Nature Physics
Volume: 7
Pages: 849-853
DOI
Peer Reviewed
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