General transport properties of superconducting quantum point contacts: A Green functions approach
EntityUAM. Departamento de Física Teórica de la Materia Condensada
PublisherAcademic Press Inc.
10.1006/spmi.1999.0744Superlattices and Microstructures 25.5 (1999): 925-936
ISSN0749-6036 (print); 1096-3677 (online)
Funded byThis work has been supported by the Spanish CICyT under contract PB97-0044
ProjectGobierno de España. PB97-0044
NoteThis is the peer reviewed version of the following article: Superlattices and Microstructures 25.5 (1999): 925-936, which has been published in final form at http://dx.doi.org/10.1006/spmi.1999.0744
Rights© 1999 Academic Press
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's 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
Google Scholar:Martin-Rodero, A. - Levy-Yeyati Mizrahi, Alfredo - Cuevas Rodríguez, Juan Carlos
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