Proximity effect and multiple Andreev reflections in diffusive superconductor–normal-metal–superconductor junctions
J. C. Cuevas, J. Hammer, J. Kopu, J. K. Viljas, M. Eschrig
DOI 10.1103/PhysRevB.73.184505 · Physical Review B
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Abstract
We present a theory of the current-voltage characteristics in diffusive superconductor–normal-metal–superconductor junctions. By solving the time-dependent Usadel equations we are able to describe the phase-coherent transport for arbitrary length of the normal wire. We show how the interplay between proximity effect and multiple Andreev reflections gives rise to a rich subgap structure in the conductance and how it is revealed in the nonequilibrium distribution function.
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