2008年12月
Colossal Enhancement of Upper Critical Fields in Noncentrosymmetric Heavy Fermion Superconductors near Quantum Criticality: CeRhSi3 and CeIrSi3
PHYSICAL REVIEW LETTERS
- ,
- ,
- 巻
- 101
- 号
- 26
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevLett.101.267006
- 出版者・発行元
- AMER PHYSICAL SOC
Strong-coupling effects on the upper critical fields H-c2 along the c axis in the noncentrosymmetric heavy fermion superconductors near quantum criticality CeRhSi3 and CeIrSi3 are examined. For sufficiently large spin-orbit interactions due to the lack of inversion symmetry, H-c2 is mainly determined by the orbital depairing effects. From microscopic calculations taking into account the strong spin fluctuations, we show that H-c2 is extremely enhanced as the system approaches the quantum critical point, resulting in H-c2 similar to 30 T even in the case of a low transition temperature T-c(H=0)similar to 1 K, which explains well the huge H-c2 observed in the recent experiments.
- リンク情報
- ID情報
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- DOI : 10.1103/PhysRevLett.101.267006
- ISSN : 0031-9007
- Web of Science ID : WOS:000262247100068