Observations on Cooper-limit-like behavior in strong coupling: Normal-superconducting bilayers at critical fields

H. J. Tao, T. P. Chen, E. L. Wolf

Research output: Contribution to journalArticle

Abstract

Tunneling measurements of clean Mg/Nb and Al/Nb (normal-superconducting, NS) bilayers, with N-metal thicknesses 100, reveal a superconducting order parameter at the N surface proportional in magnitude to that in S, even in fields closely approaching the critical values for bulk S (Nb). The parallel decay of N and S phonon features with field, as first observed here, implies an order parameter nearly constant over the NS structure even under strong local depairing conditions.

Original languageEnglish (US)
Pages (from-to)5272-5275
Number of pages4
JournalPhysical Review B
Volume26
Issue number9
DOIs
StatePublished - 1982

ASJC Scopus subject areas

  • Condensed Matter Physics

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