Large energy dependence of current noise in superconducting/normal metal junctions

Details Large energy dependence of current noise in superconducting/normal metal junctions Large energy dependence of current noise in superconducting/normal metal junctions

2004-09-14

arxiv.org/abs/cond-mat/0409354v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Proceeding of the conference MS+S2004 NTT Atsugi (Japan). 5 pages, no figures

Scientific paper

Interference of electronic waves undergoing Andreev reflection in diffusive conductors determines the energy profile of the conductance on the scale of the Thouless energy. A similar dependence exists in the current noise, but its behavior is known only in few limiting cases. We consider a metallic diffusive wire connected to a superconducting reservoir through an interface characterized by an arbitrary distribution of channel transparencies. Within the quasiclassical theory for current fluctuations we provide a general expression for the energy dependence of the current noise. We derive closed analytical expressions for large energy.

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