Incoherent multiple Andreev reflection in an array of SNS junctions
N. M. Chtchelkatchev
L. D. Landau Institute for Theoretical Physics RAS, 117940 Moscow, Russia
Institute for High Pressure Physics RAS, 142092 Troitsk, Moscow Region, Russia
Moscow Institute of Physics and Technology, 141700 Moscow, Russia
PACS: 73.23.-b, 74.45.+c, 74.81.Fa
Last years many interesting effects related to incoherent
multiple Andreev reflection (MAR) have
been experimentally found, but only few of them were theoretically explained.
It was shown, for example, that if the voltage at the edges of a linear array
is V then subgarmonic structures in the current-voltage characteristics
appear not only at usual for nonstationary Josephson effect positions,
Vn=2Δ/n, where n is integer, but also at voltages other than
Vn. A step towards description of electron transport in a dirty array of
SNS junctions is done in this letter. It is shown that subgarmonic structures
may indeed appear at "unusual" voltages.