✦ LIBER ✦
Josephson current carried by Andreev levels in superconducting quantum point contacts
✍ Scribed by Akira Furusaki
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 164 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0749-6036
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✦ Synopsis
The dc Josephson effect in a superconducting quantum point contact, where supercurrent flows through a small number of channels, is reviewed. The central role of Andreev levels is emphasized which carry the whole supercurrent in short symmetric Josephson junctions including tunnel junctions. A simple intuitive view of the dc Josephson effect in a quantum point contact is given in terms of multiple Andreev reflections. The quantization of the critical current in superconducting quantum point contacts is briefly discussed.