Non-centrosymmetric Superconductivity and Antiferromagnetic Order: Microscopic discussion of CePt$_3$Si

Youichi Yanase; Manfred Sigrist

doi:10.1143/JPSJ.76.043712

Non-centrosymmetric Superconductivity and Antiferromagnetic Order: Microscopic discussion of CePt$_3$Si

Superconductivity 2009-11-13 v1 Strongly Correlated Electrons

Authors: Youichi Yanase , Manfred Sigrist

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Abstract

The influence of antiferromagnetic order on the superconductivity in the non-centrosymmetric heavy fermion compound CePt $_3$ Si 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 $T_{\rm c}$ . 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 $_3$ Si.

Keywords

non-centrosymmetric superconductivity antiferromagnetic order CePt3Si heavy fermion spin fluctuation p-wave pairing

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@article{arxiv.cond-mat/0702478,
  title  = {Non-centrosymmetric Superconductivity and Antiferromagnetic Order: Microscopic discussion of CePt$_3$Si},
  author = {Youichi Yanase and Manfred Sigrist},
  journal= {arXiv preprint arXiv:cond-mat/0702478},
  year   = {2009}
}

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To appear in J. Phys. Soc. Jpn. Vol.76 (2007) No.4

Non-centrosymmetric Superconductivity and Antiferromagnetic Order: Microscopic discussion of CePt$_3$Si

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