Mesoscopic fluctuations of the Coulomb drag
B. N. Narozhny, I. L. Aleiner
Abstract
We consider mesoscopic fluctuations of the Coulomb drag coefficient ρD in the system of two separated two-dimensional electron gases. It is shown that at low temperatures sample to sample fluctuations of ρD exceed its ensemble average. It means that in such a regime the sign of ρD is random and the temperature dependence almost saturates ρD 1/T.
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