Synchronized Andreev Transmission in SNS Junction Arrays

Details Synchronized Andreev Transmission in SNS Junction Arrays Synchronized Andreev Transmission in SNS Junction Arrays

2009-12-16

arxiv.org/abs/0912.3286v2

Phys. Rev. B 82, 024526 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures

Scientific paper

10.1103/PhysRevB.82.024526

We construct a nonequilibrium theory for the charge transfer through a diffusive array of alternating normal (N) and superconducting (S) islands comprising an SNSNS junction, with the size of the central S-island being smaller than the energy relaxation length. We demonstrate that in the nonequilibrium regime the central island acts as Andreev retransmitter with the Andreev conversions at both NS interfaces of the central island correlated via over-the-gap transmission and Andreev reflection. This results in a synchronized transmission at certain resonant voltages which can be experimentally observed as a sequence of spikes in the differential conductivity.

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