Doppler shift in Andreev reflection from a moving superconducting condensate in Nb/InAs Josephson junctions

URN to cite this document:: urn:nbn:de:bvb:355-epub-79786
DOI to cite this document:: 10.5283/epub.7978

Rohlfing, Franziska ; Tkachov, Grygoriy

; Otto, Florian ; Richter, Klaus ; Weiss, Dieter

; Borghs, G. ; Strunk, Christoph

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arXiv PDF (22.10.2009)
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Date of publication of this fulltext: 05 Aug 2009 13:58

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Abstract

We study narrow ballistic Josephson weak links in a InAs quantum wells contacted by Nb electrodes and find a dramatic magnetic-field suppression of the Andreev reflection amplitude, which occurs even for in-plane field orientation with essentially no magnetic flux through the junction. Our observations demonstrate the presence of a Doppler shift in the energy of the Andreev levels, which results ...