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Mixed order parameter symmetries in cuprate superconductors

A. Bussmann-Holder, R. Khasanov, A. Shengelaya, A. Maisuradze, F. La Mattina, H. Keller, K. A. Mueller

cond-mat.supr-conarXiv:cond-mat/0610327

Abstract

The recent observation of an inflection point in the temperature dependence of the in-plane magnetic field dependence (lambdaab) is investigated within a two-band model with coupled order parameters of different symmetries. While the dominant order parameter has d-wave symmetry, the smaller one is of s-wave symmetry. Superconductivity is robust in the d-wave channel and induced via interband interactions in the s-wave subsystem.

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