Ansiotropic s- wave superconductivity in borocarbides LuNi2B2C and YNi2B2C

Details Ansiotropic s- wave superconductivity in borocarbides LuNi2B2C and YNi2B2C Ansiotropic s- wave superconductivity in borocarbides LuNi2B2C and YNi2B2C

2001-10-29

arxiv.org/abs/cond-mat/0110591v2

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.65.140502

The symmetry of superconductivity in borocarbides LuNi2B2C and YNi2B2C is an outstanding issue. Here an anisotropic s- wave order parameter (or s+g model) is proposed for these borocarbides. In spite of the dominant s- wave component the proposed superconducting order parameter has nodes and gives rise to the H^(1/2) dependent specific heat in the vortex state (the Volovik effect). This model predicts the fourfold symmetry both in the angular dependent thermal conductivity and in the excess Dingle temperature in the vortex state, which should be readily accessible experimentally.

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