Evidence of two-electron tunneling interference in Nb/InAs junctions

Details Evidence of two-electron tunneling interference in Nb/InAs junctions Evidence of two-electron tunneling interference in Nb/InAs junctions

2000-07-08

arxiv.org/abs/cond-mat/0007140v1

Physics

Condensed Matter

Superconductivity

10 pages (RevTex), 4 figures (PostScript), accepted for pubblication in Physical Review B

Scientific paper

10.1103/PhysRevB.62.9831

The impact of junction transparency in driving phase-coherent charge transfer across diffusive semiconductor-superconductor junctions is demonstrated. We present conductivity data for a set of Nb-InAs junctions differing only in interface transparency. Our experimental findings are analyzed within the quasi-classical Green-function approach and unambiguously show the physical processes giving rise to the observed excess zero-bias conductivity.

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