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

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

2000-11-27

arxiv.org/abs/cond-mat/0011457v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 1 eps figure

Scientific paper

10.1103/PhysRevLett.86.3610

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 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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