2015 Fiscal Year Final Research Report
Study of exotic superconductivity by combining microscopic theory and phenomenological theory
| Project/Area Number |
24740230
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics II
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| Research Institution | Kyoto University (2015)
Niigata University (2012-2014) |
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Principal Investigator |
Yanase Youichi 京都大学, 理学(系)研究科(研究院), 准教授 (70332575)
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| Project Period (FY) |
2012-04-01 – 2016-03-31
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| Keywords | スピン軌道相互作用 / エキゾチック超伝導 / 奇パリティ多極子 / 自発的対称性の破れ / 強相関電子系 |
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| Outline of Final Research Achievements |
(1) We determined the superconducting phase diagram of Sr2RuO4 in the magnetic field with the use of the microscopic theory based on the three-orbital Hubbard model. We showed a variety of superconducting phases in the c-axis magnetic field. In particular, the chiral-II phase is a skyrmion lattice phase consisting of the fractional quantum vortices. (2) We showed the magnetoelectric effects and exotic superconducting phases in locally noncentrosymmetric systems. (3) We investigated the nematic-chiral superconducting state in URu2Si2 and predicted structural transitions in vortex lattice. (4) We showed that the superconducting phase in locally noncentrosymmetric system is a topological superconducting phase protected by mirror symmetry.
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| Free Research Field |
物性理論
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