Josephson effect in point contacts between two-band superconductors
Abstract
The microscopic theory of Josephson effect in point contacts between two-band superconductors is developed. The general expression for the Josephson current, which is valid for arbitrary temperatures, is obtained. We considered the dirty superconductors with interband scattering, which produces the coupling of the Josephson currents between different bands. The influence of phase shifts and interband scattering rates in the banks is analyzed near critical temperature Tc. It is shown that for some values of parameters the critical current can be negative, which means the pi-junction behavior.
Cite
@article{arxiv.0910.1429,
title = {Josephson effect in point contacts between two-band superconductors},
author = {A. N. Omelyanchouk and Y. S. Yerin},
journal= {arXiv preprint arXiv:0910.1429},
year = {2009}
}
Comments
11 pages, 3 figures, submitted for publication in the proceedings of NATO advanced research workshop "Physical properties of nanosystems (PPN-2009)", 28 September - 2 October 2009, Yalta, Ukraine