Shot noise and coherent multiple charge transfer in superconducting quantum point-contacts
Superconductivity
2009-10-31 v1 Mesoscale and Nanoscale Physics
Abstract
We analyze the shot noise in a voltage biased superconducting quantum point-contact. Results are presented for the single channel case with arbitrary transmission. In the limit of very low transmission it is found that the effective charge, defined from the noise-current ratio, exhibits a step-like behavior as a function of voltage with well defined plateaus at integer values of the electronic charge. This multiple charge corresponds to the transmitted charge in a Multiple Andreev Reflection (MAR) process. This effect gradually disappears for increasing transmission due to interference between different MAR processes.
Keywords
Cite
@article{arxiv.cond-mat/9812175,
title = {Shot noise and coherent multiple charge transfer in superconducting quantum point-contacts},
author = {J. C. Cuevas and A. Martin-Rodero and A. Levy Yeyati},
journal= {arXiv preprint arXiv:cond-mat/9812175},
year = {2009}
}
Comments
RevTex, 10 pages, 3 eps figures. Submitted to PRL