Cross-correlated shot noise in three-terminal superconducting hybrid nanostructures

Abstract

We work out a unified theory describing both non-local electron transport and cross-correlated shot noise in a three-terminal normal-superconducting-normal (NSN) hybrid nanostructure. We describe noise cross correlations both for subgap and overgap bias voltages and for arbitrary distribution of channel transmissions in NS contacts. We specifically address a physically important situation of diffusive contacts and demonstrate a non-trivial behavior of non-local shot noise exhibiting both positive and negative cross correlations depending on the bias voltages. For this case, we derive a relatively simple analytical expression for cross-correlated noise power which contains only experimentally accessible parameters. NSN structures with low transparency contacts 6 .One possible way to discriminate between CAR and EC processes is to investigate fluctuations of the currents I 1 and I 2 . It is well known that in normal (i.e. arXiv:1902.05476v2 [cond-mat.supr-con]

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