Temperature dependence of the superfluid density in a noncentrosymmetric superconductor

Abstract

For a noncentrosymmetric superconductor such as Ce Pt3 Si, we consider a Cooper pairing model with a two-component order parameter composed of spin-singlet and spin-triplet pairing components. We calculate the superfluid density tensor in the clean limit on the basis of the quasiclassical theory of superconductivity. We demonstrate that such a pairing model accounts for an experimentally observed feature of the temperature dependence of the London penetration depth in Ce Pt3 Si, i.e., line-node-gap behavior at low temperatures. © 2006 The American Physical Society.