期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 26, 期 4, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/0953-8984/26/4/045702
关键词
Meissner effect; proximity effect; inhomogeneous superconductors; Ginzburg-Landau theory; London theory
资金
- Russian Foundation for Basic Research
The effect of smooth inhomogeneities near a superconductor boundary on the magnetic penetration depth lambda is studied with emphasis on the proximity-induced spatial dependence of the Cooper pair amplitude. The influence of surface pair breaking or pair formation on lambda is described within the Ginzburg-Landau theory, with no model assumptions, for both strongly type-II and strongly type-I homogeneous superconductors. Generic values of lambda, which can differ greatly from the London penetration depth, are identified and demonstrated to be induced by large-scale inhomogeneities, when superconductivity is strongly suppressed on the surface.
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