Analytical calculation of the excess current in the OTBK theory
Superconductivity
2009-09-30 v1 Mesoscale and Nanoscale Physics
Abstract
We present an analytical derivation of the excess current in Josephson junctions within the Octavio-Tinkham-Blonder-Klapwijk theory for both symmetric and asymmetric barrier strengths. We confirm the result found numerically by Flensberg et al. for equal barriers [Phys. Rev. B 38, 8707 (1988)], including the prediction of negative excess current for low transparencies, and we generalize it for differing barriers. Our analytical formulae provide for convenient fitting of experimental data, also in the less studied, but practically relevant case of the barrier asymmetry.
Keywords
Cite
@article{arxiv.0905.4852,
title = {Analytical calculation of the excess current in the OTBK theory},
author = {Gabriel Niebler and Gianaurelio Cuniberti and Tomas Novotny},
journal= {arXiv preprint arXiv:0905.4852},
year = {2009}
}
Comments
13 pages, 3 figures, submitted to Superconductor Science and Technology