Is Sr2RuO4 a triplet superconductor?

K. Machida; M. Ichioka

Is Sr2RuO4 a triplet superconductor?

Superconductivity 2007-06-12 v1

Authors: K. Machida , M. Ichioka

Abstract

The field dependence of the specific heat \gamma(H) at lower temperatures in Sr2RuO4 is analyzed by solving microscopic Eilenberger equation numerically. We find that systematic \gamma(H) behaviors from a concaved \sqrt H to a convex H^{\alpha} (\alpha>1) under H orientation change are understood by taking account of the Pauli paramagnetic effect. The magnetizations are shown to be consistent with it. This implies either a singlet pairing or a triplet one with d-vector locked in the basal plane, which allows us to explain other mysteries of this compound in a consistent way.

Cite

@article{arxiv.0706.1426,
  title  = {Is Sr2RuO4 a triplet superconductor?},
  author = {K. Machida and M. Ichioka},
  journal= {arXiv preprint arXiv:0706.1426},
  year   = {2007}
}

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