Energy dependence of current noise in superconducting/normal metal junctions

Details Energy dependence of current noise in superconducting/normal metal junctions Energy dependence of current noise in superconducting/normal metal junctions

2003-10-17

arxiv.org/abs/cond-mat/0310418v1

Phys. Rev. Lett. 92 107004 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 1 Figure

Scientific paper

10.1103/PhysRevLett.92.107004

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.

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