Critical fields of weakly coupled superconductors

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Abstract

The parallel critical field of a stack of superconducting and insulating layers is calculated as a function of the superconducting layer's coherence length ξ and thickness d interlayer coherence length ξ, and insulating thickness s. It is shown that the critical field shows an upturn when the stack crosses over from the strongly coupled or three-dimensional regime (ξ>s+d) to the weakly coupled or two-dimensional regime (ξ<s+d). This upturn is a general property of such stacks, though it is more pronounced when s>d.

Original languageEnglish
Pages (from-to)1249-1252
Number of pages4
JournalPhysical Review B-Condensed Matter
Volume17
Issue number3
DOIs
StatePublished - 1978

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