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VOLUME 83 (2006) | ISSUE 6 | PAGE 294
Incoherent multiple Andreev reflection in an array of SNS junctions
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.