Anomalous proximity effect in an inhomogeneous disordered superconductor

By combining very low temperature scanning tunneling microscopy and spectroscopy on a TiN film we have observed a nonuniform state comprising of superconducting (S) and normal (N) areas. The local density of states displays a spatial dependence between S and N different from the usual proximity effe...

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Bibliographic Details
Published in:Physical review letters 2004-11, Vol.93 (21), p.217005.1-217005.4, Article 217005
Main Authors: ESCOFFIER, W, CHAPELIER, C, HADACEK, N, VILLEGIER, J.-C
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Physics
Proximity effects, weak links, tunneling phenomena, and josephson effects, adreev effect, sn and sns junctions
Superconductivity
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Summary:By combining very low temperature scanning tunneling microscopy and spectroscopy on a TiN film we have observed a nonuniform state comprising of superconducting (S) and normal (N) areas. The local density of states displays a spatial dependence between S and N different from the usual proximity effect. We conclude that mesoscopic fluctuations might play a major role in accordance with recent theories describing superconductor-normal-metal quantum transition.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.93.217005