Anomalous proximity effect in gold coated (110) YBa2Cu 3O7-δ films: Penetration of the andreev bound states

Itay Asulin, Amos Sharoni, Ofer Yulli, Gad Koren, Oded Millo

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15 Scopus citations

Abstract

The penetration of Andreev bound states (ABS) with exhibition of anomalous proximity effect (PE) in gold coated (110) YBa2iCu3iO films was analyzed using scanning tunneling spectroscopy. It was observed that while proximity-induced mini-gaps rarely appears in the Au layer, the ABS penetrate into the metal. The zero bias conductance peaks were measured on Au layers, which were thinner than 7 nm with a magnitude similar to those detected on the bare superconductor films. the results show abrupt decay of the peaks with Au thickness and disappear above 10 nm.

Original languageEnglish
Article number157001
Pages (from-to)157001-1-157001-4
JournalPhysical Review Letters
Volume93
Issue number15
DOIs
StatePublished - 8 Oct 2004
Externally publishedYes

Bibliographical note

Funding Information:
We thank Guy Deutscher for stimulating discussions. This research was supported in part by the Israel Science Foundation (Grant No. 1565/04), by the Heinrich Hertz Minerva Center for HTSC, by the Karl Stoll Chair in advanced materials, and by the Fund for the Promotion of Research at the Technion.

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