Volume 61, Number 6, March 2003
|Page(s)||824 - 830|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 March 2003|
Spectral flow in superconducting point contacts
Low Temperature Laboratory, Helsinki University of Technology FIN-02015, Finland
2 L. D. Landau Institute for Theoretical Physics - 117940 Moscow, Russia
3 Argonne National Laboratory - Argonne, IL 60439, USA
Accepted: 17 January 2003
We find that multiple Andreev reflections mediating the transport in superconducting point contacts are strongly affected by a small amount of impurities in the area of the contact. We also argue that the model based on Zener transitions within independent conducting channels is not suitable for kinetic processes in multichannel contacts.
PACS: 74.80.Fp – Point contacts; SN and SNS junctions / 73.23.-b – Electronic transport in mesoscopic systems / 73.63.Rt – Nanoscale contacts
© EDP Sciences, 2003
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