Superconductivity and Magnetism in Non-centrosymmetric System : Application to CePt_3Si(Condensed matter: electronic structure and electrical, magnetic, and optical properties)

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概要

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• Superconductivity and magnetism in the non-centrosymmetric heavy fermion compound CePt_3Si and related materials are theoretically investigated. On the basis of the random phase approximation (RPA) analysis of the extended Hubbard model, we describe the helical spin fluctuation induced by the Rashba-type anti-symmetric spin-orbit coupling and identify two stable superconducting phases with either the dominant p-wave (s+P-wave) symmetry or the d-wave (p+D+f-wave) symmetry. The effect of the coexistent antiferromagnetic order is investigated in both states. The superconducting order parameter, quasiparticle density of state, NMR 1/T_1T, specific heat, anisotropy of H_<c2>, and possible multiple phase transitions are discussed in detail. A comparison with experimental results indicates that the s+P-wave superconducting state is likely realized in CePt_3Si.

• 社団法人日本物理学会の論文
• 2008-12-15

著者

• Sigrist Manfred

  Theoretische Physik Eth-honggerberg

• Sigrist Manfred

  Theoretische Physik Eth-honggerberg:department Of Physics Kyoto University

• Yanase Youichi

  Department Of Physics Kyoto University

• Sigrist Manfred

  Theoretische Physik

• Yanase Youichi

  Univ. Tokyo Tokyo

• Sigrist Manfred

  Theoretische Physik, ETH-Honggerberg:Department of Physics, Kyoto University

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