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Quasiparticle current in ballistic NcN′S junctions

✍ Scribed by A.A. Golubov; M.Yu. Kupriyanov

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
695 KB
Volume
259
Category
Article
ISSN
0921-4534

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✦ Synopsis

Nonstationary properties of ballistic constrictions NcN'S with disordered N'S electrodes are analyzed theoretically. Amplitudes of Andreev and normal reflections at the constriction are related to the solutions of a stationary Green's function problem in an inhomogeneous N'S electrode in a dirty limit. This provides a generalization of the model of Blonder, Tinkham and Klapwijk for a spatially inhomogeneous case. The relation between quasiparticle current in NcN'S junctions and the energy spectrum of a N'S proximity sandwich is found for arbitrary parameters of N' and S materials and of the N'S interface.

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