General transport properties of superconducting quantum point contacts: a Green functions approach
Abstract
We discuss the general transport properties of superconducting quantum point contacts. We show how these properties can be obtained from a microscopic model using nonequilibrium Green function techniques. For the case of a one-channel contact we analyze the response under different biasing conditions: constant applied voltage, current bias and microwave-induced transport. Current fluctuations are also analyzed with particular emphasis on thermal and shot-noise. Finally, the case of superconducting transport through a resonant level is discussed. The calculated properties show a remarkable agreement with the available experimental data from atomic-size contacts measurements. We suggest the possibility of extending this comparison to several other predictions of the theory.
Keywords
Cite
@article{arxiv.cond-mat/9811290,
title = {General transport properties of superconducting quantum point contacts: a Green functions approach},
author = {A. Martin-Rodero and A. Levy Yeyati and J. C. Cuevas},
journal= {arXiv preprint arXiv:cond-mat/9811290},
year = {2009}
}
Comments
10 pages, revtex, 8 figures, submitted to a special issue of Superlattices and Microstructures