Mesoscopic fluctuations of the Coulomb drag at nu = 1/2.
We consider mesoscopic fluctuations of Coulomb drag transresistivity between two layers at a Landau level filling factor nu = 1/2 each. We find that, at low temperatures, 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.
Narozhny
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Department of Physics and Astronomy, SUNY at Stony Brook, Stony Brook, New York 11794, USA.
Aleiner
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Stern
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