Quasiparticle current of ballistic NcS'S contacts
Golubov A. A. , Kupriyanov M. Yu.
An approach developed by Blonder, Tinkham, and Klapwijk4 for calculating current-voltage characteristics of NcS contacts is generalized to the case of a dirty S'S electrode with spatially nonuniform superconducting properties. The amplitudes for Andreev and normal reflection of electrons from the constriction are calculated. The relationship between the quasiparticle current of the contact and the quasiparticle spectrum in the S'S electrode is studied for arbitrary values of the parameters of the S' and S materials and for arbitrary values of the superconductivity suppression parameter at the S'S interface. © 1995