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Geometrical enhancement of the proximity effect in quantum wires with extended superconducting tunnel contacts

URN to cite this document:
urn:nbn:de:bvb:355-epub-15326
DOI to cite this document:
10.5283/epub.1532
Fagas, Giorgos ; Tkachov, Grygoriy ; Pfund, Andreas ; Richter, Klaus
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PDF - Published Version
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PDF - Accepted Version
arXiv PDF (11.04.2005)
(343kB)
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PDF - Submitted Version
arXiv PDF (12.01.2005)
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Date of publication of this fulltext: 05 Aug 2009 13:30



Abstract

We study Andreev reflection in a ballistic one- dimensional channel coupled in parallel to a superconductor via a tunnel barrier of finite length {\it L}. The dependence of the low-energy Andreev reflection probability {\it R$_{A}$} on {\it L} reveals the existence of a characteristic length scale {\it $\xi$;$_{N}$} beyond which {\it R$_{A}$(L)} is enhanced up to unity despite the low ...

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