We consider mesoscopic fluctuations of Coulomb drag transresistivity between two layers at a Landau level filling factor v = 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 Bur quanta to each electron.
机构:
Univ New South Wales, UNSW Node, Sch Phys, Sydney, NSW 2052, Australia
Univ New South Wales, UNSW Node, Australian Res Council Ctr Excellence Low Energy, Sydney, NSW 2052, AustraliaUniv New South Wales, UNSW Node, Sch Phys, Sydney, NSW 2052, Australia
Liu, Hong
Culcer, Dimitrie
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机构:
Univ New South Wales, UNSW Node, Sch Phys, Sydney, NSW 2052, Australia
Univ New South Wales, UNSW Node, Australian Res Council Ctr Excellence Low Energy, Sydney, NSW 2052, AustraliaUniv New South Wales, UNSW Node, Sch Phys, Sydney, NSW 2052, Australia