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Josephson current carried by Andreev levels in superconducting quantum point contacts | | A. Furusaki
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3 Nov 1998 | | Journal: | Superlattices and Microstructures 25 (1999) 809 | | Subject: | Superconductivity; Mesoscopic Systems and Quantum Hall Effect | cond-mat.supr-con cond-mat.mes-hall | | Abstract: | The dc Josephson effect in a superconducting quantum point contact, where supercurrent flows through a small number of channels, is reviewd. 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. | | Source: | arXiv, cond-mat/9811026 | | Services: | Forum | Review | PDF | Favorites | |
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