Current fluctuations in a single tunnel junction

Details Current fluctuations in a single tunnel junction Current fluctuations in a single tunnel junction

1995-07-25

arxiv.org/abs/cond-mat/9507105v1

Phys. Rev. B53, 7383 (1996)

Physics

Condensed Matter

25 pages, Revtex 3.0

Scientific paper

10.1103/PhysRevB.53.7383

We study noise spectra of currents through a tunnel junction in weak tunneling limit. We introduce effective capacitance to take into account the interaction effect and explicitly incorporate the electromagnetic environment of the junction into the formulation. We study the effect of charging energy and macroscopic environment on noise spectra. We calculate current fluctuations at tunneling barrier and fluctuations measured at leads. It is shown that two fluctuations have different noise spectra and the relation between them is nontrivial. We provide an explanation for the origin of the difference. Experimental implications are discussed.

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