Phase dependent current statistics in short-arm Andreev interferometer
Abstract
We calculate analytically the current statistics for a short diffusive wire between the normal reservoir and a short superconductor-normal metal-superconductor (SNS) junction, at arbitrary applied voltages and temperatures. The cumulant-generating function oscillates with the phase difference across the junction, approaching the normal-state value at . At T=0 and at the applied voltage much smaller than the proximity gap , the current noise doubles and the third current cumulant is 4 times larger with respect to their values in the normal state; at they acquire large excess components. At the gap edge, , the effective transferred charge defined through and approaches and , respectively, which makes doubtful the interpretation of these quantities as physical elementary transferred charge. At , shows a non-monotonous voltage dependence with a dip near .
Cite
@article{arxiv.cond-mat/0311176,
title = {Phase dependent current statistics in short-arm Andreev interferometer},
author = {E. V. Bezuglyi and E. N. Bratus' and V. S. Shumeiko and V. Vinokur},
journal= {arXiv preprint arXiv:cond-mat/0311176},
year = {2009}
}
Comments
13 pages, to be published in Proc. NATO ARW "Quantum Transport in Metallic and Hybrid Nanostructures", StPetersburg, 2003