DC Josephson Effect in SNS Junctions of Anisotropic Superconductors

Details DC Josephson Effect in SNS Junctions of Anisotropic Superconductors DC Josephson Effect in SNS Junctions of Anisotropic Superconductors

2001-10-04

arxiv.org/abs/cond-mat/0110085v1

Physical Review B 64, 224515 (2001).

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevB.64.224515

A formula for the Josephson current between two superconductors with anisotropic pairing symmetries is derived based on the mean-field theory of superconductivity. Zero-energy states formed at the junction interfaces is one of basic phenomena in anisotropic superconductor junctions. In the obtained formula, effects of the zero-energy states on the Josephson current are taken into account through the Andreev reflection coefficients of a quasiparticle. In low temperature regimes, the formula can describe an anomaly in the Josephson current which is a direct consequence of the exsitence of zero-energy states. It is possible to apply the formula to junctions consist of superconductors with spin-singlet Cooper pairs and those with spin-triplet Cooper pairs.

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