DC Josephson Effect in SNS Junctions of Anisotropic Superconductors
Abstract
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.
Keywords
Cite
@article{arxiv.cond-mat/0110085,
title = {DC Josephson Effect in SNS Junctions of Anisotropic Superconductors},
author = {Yasuhiro Asano},
journal= {arXiv preprint arXiv:cond-mat/0110085},
year = {2009}
}