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題目 |
Anomalous fluctuation regimes at the FFLO transition |
講師 |
Prof. Alexander Buzdin, University Bordeaux I |
日時 |
平成19年5月8日 16:00から |
場所 |
コラボレーションセンター 3階 コラボレーション室 |
要旨 |
Recently some experimental evidences have been obtained in favour of the
existence of the inhomogeneous Fulde-Ferrell-Larkin-Ovchinnikov (FFLO)
superconducting state in heavy-fermion superconductor CeCoIn5 and organic
superconductor (BETS)2FeCl4. However the unambiguous identification of
FFLO state remains very difficult. We present the theoretical studies of
the Gaussian fluctuations near the tricritical point (where the FFLO modulation
appears) and demonstrate that the behavior of the fluctuational specific
heat, paraconductivity and diamagnetism is qualitatively different from
the usual superconducting transition. Special values of the critical exponent
and the crossovers between different fluctuational regimes may provide
a unique test for the FFLO state appearance. |
世話人 |
町田 一成 (内線:7814) |
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