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Mesoscopic fluctuations of the Coulomb drag

B. N. Narozhny·I. L. Aleiner
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Abstract

We consider mesoscopic fluctuations of the Coulomb drag coefficient $ρ_D$ in the system of two separated two-dimensional electron gases. It is shown that at low temperatures sample to sample fluctuations of $ρ_D$ exceed its ensemble average. It means that in such a regime the sign of $ρ_D$ is random and the temperature dependence almost saturates $ρ_D \sim 1/\sqrt{T}$.

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B. N. Narozhny, I. L. Aleiner. 1999-09-09. Mesoscopic fluctuations of the Coulomb drag. https://doi.org/10.1103/physrevlett.84.5383

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