Current fluctuations in composite conductors: Beyond the second cumulant

Details Current fluctuations in composite conductors: Beyond the second cumulant Current fluctuations in composite conductors: Beyond the second cumulant

2011-03-24

arxiv.org/abs/1103.4754v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 1 figure

Scientific paper

Employing the non-linear $\sigma$-model we analyze current fluctuations in coherent composite conductors which contain a diffusive element in-between two tunnel barriers. For such systems we explicitly evaluate the frequency-dependent third current cumulant which also determines the leading Coulomb interaction correction to shot noise. Our predictions can be directly tested in future experiments.

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