2010 Fiscal Year Final Research Report
Development of New Theory for Fermi Superfluidity
| Project/Area Number |
19340099
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Osaka University |
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Principal Investigator |
MIYAKE Kazumasa 大阪大学, 大学院・基礎工学研究科, 教授 (90109265)
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| Co-Investigator(Kenkyū-buntansha) |
TSURUTA Atsushi 大阪大学, 大学院・基礎工学研究科, 助教 (40397716)
FUSEYA Yuki 大阪大学, 大学院・基礎工学研究科, 助教 (00377954)
WATANABE Shinji 大阪大学, 大学院・基礎工学研究科, 特任准教授 (40334346)
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| Project Period (FY) |
2007 – 2010
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| Keywords | 強相関電子系 / 異方的超伝導 / 臨界価数ゆらぎ / BCS-BECクロスオーバー / 量子臨界現象 / 奇周波数超伝導 / 反強磁性と超伝導の共存 |
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| Research Abstract |
We have developed a theory of superconductivity due to the critical valence fluctuations, showing that the theory explains existing experimental results in a unified way. This implies that the critical valence fluctuations play the important role in Ce-and Yb-based heavy fermion metals. We found that the quantum critical valence transition exhibit non-Fermi liquid behaviors of new universality class which gives a basis of understanding unconventional non-Fermi liquid behaviors such as in YbRh_2Si_2 and.-YbAlB_4. It is a great success that the paradox of negative Meissner effect in odd-frequency superconductivity was solved, releasing its superconductivity from skeptical atmosphere in the community of strongly correlated electron systems.
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