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

F. Pistolesi·M. Houzet
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Abstract

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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F. Pistolesi, M. Houzet. 2004-09-14. Large energy dependence of current noise in superconducting/normal metal junctions. https://doi.org/10.1142/9789812701619_0013

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