Non-centrosymmetric Superconductivity and Antiferromagnetic Order : Microscopic Discussion of CePt_3Si(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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The influence of antiferromagnetic order on the superconductivity in the non-centrosymmetric heavy fermion compound CePt_3Si and related materials is discussed. Based on our RPA analysis for the extended Hubbard model two phases could be stabilized by a spin fluctuation induced pairing, with either dominantly p-wave or d-wave symmetry. The antiferromagnetic order plays an essential role for the low-energy physics, in particular, for the appearance of line nodes in the gap and the enhancement of spin susceptibility below T_c. Various properties and possible phase diagrams under pressure are analyzed. The present experimental situation suggests that the p-wave phase is most likely realized in CePt_3Si.
- 社団法人日本物理学会の論文
- 2007-04-15
著者
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Sigrist Manfred
Theoretische Physik Eth-honggerberg
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Sigrist Manfred
Theoretische Physik Eth-honggerberg:department Of Physics Kyoto University
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Yanase Youichi
Department Of Physics Kyoto University
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Sigrist Manfred
Theoretische Physik
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Yanase Youichi
Univ. Tokyo Tokyo
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