Supercurrent dephasing by electron-electron interactions
Mesoscale and Nanoscale Physics
2015-06-23 v1
Abstract
We demonstrate that in sufficiently long diffusive superconducting-normal-superconducting () junctions dc Josephson current is exponentially suppressed by electron-electron interactions down to zero temperature. This suppression is caused by the effect of {\it Cooper pair dephasing} which occurs in the normal metal and defines a new fundamental length scale in the problem. Provided the temperature length exceeds this dephasing length can be conveniently extracted from equilibrium measurements of the Josephson current.
Cite
@article{arxiv.1411.2558,
title = {Supercurrent dephasing by electron-electron interactions},
author = {Andrew G. Semenov and Andrei D. Zaikin},
journal= {arXiv preprint arXiv:1411.2558},
year = {2015}
}
Comments
11 pages, 3 figures