General transport properties of superconducting quantum point contacts: a Green functions approach
✍ Scribed by A. Martin-Rodero; A. Levy Yeyati; J.C. Cuevas
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 304 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0749-6036
No coin nor oath required. For personal study only.
✦ Synopsis
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.