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Mesoscopic fluctuations of the Coulomb drag at $ν$=1/2

B. N. Narozhny·I. L. Aleiner·Ady Stern
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Abstract

We consider mesoscopic fluctuations of Coulomb drag transresistivity between two layers at a Landau level filling factor $ν=1/2$ each. We find that at low temperature sample to sample fluctuations exceed both the ensemble average and the corresponding fluctuations at B=0. At the experimentally relevant temperatures, the variance of the transresistivity is proportional to $T^{-1/2}$. We find the dependence of this variance on density and magnetic field to reflect the attachment of two flux quanta to each electron.

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B. N. Narozhny, I. L. Aleiner, Ady Stern. 2000-11-27. Mesoscopic fluctuations of the Coulomb drag at $ν$=1/2. https://doi.org/10.1103/physrevlett.86.3610

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