Density of states in layered short-coherence-length superconducting structures

Branko P. Stojković, Oriol T. Valls

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

We have performed a theoretical study of superconductor-normal-metal layered structures using a microscopic method. Results are given for the single-particle density of states, the order parameter, and the energy gap as a function of the coherence length, temperature, pair-breaking impurity mean-free path, and depth or probe range. The results are found to be in good agreement with those obtained from tunneling experiments on a Au-NbSe2 bilayer and on the high-temperature superconductor Nd2-xCexCuO4-y. The spatial variation of all quantities has been taken into account self-consistently. The roles of all relevant lengths and their experimental implications are discussed and emphasis is put on the case of short-coherence-length materials.

Original languageEnglish (US)
Pages (from-to)3374-3383
Number of pages10
JournalPhysical Review B
Volume50
Issue number5
DOIs
StatePublished - 1994

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