Supercurrents through SNS proximity-induced junctions
- Department of Electrical and Computer Engineering, University of California, Davis, California 95616 (United States)
Critical current measurements by Courtois {ital et al.} [Phys. Rev. B {bold 52}, 1162 (1995)] on proximity-induced superconductivity in a narrow metallic wire are analyzed by a junction model of the author based on the Ginzburg-Landau theory. Good agreement is found if one assumes that the length of at least one of the many superconducting cells is larger than anticipated by a factor of approximately 2. At low temperatures the size of the superconducting region in the normal metal is confined by the length of the normal cell. As a consequence, the critical current saturates below a temperature at which the length of the normal cell becomes approximately three characteristic lengths of the coherent state in the normal metal. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 528080
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 5 Vol. 56; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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