Gauge drag between half-filled Landau levels

Details Gauge drag between half-filled Landau levels Gauge drag between half-filled Landau levels

1996-11-15

arxiv.org/abs/cond-mat/9611125v1

Physics

Condensed Matter

Strongly Correlated Electrons

12 pages, Revtex, One Figure

Scientific paper

The transresistance (i.e. the voltage induced in one layer by a current in another) between composite fermions in double-layers of half-filled Landau levels is shown to be dominated by scattering due to singular gauge field fluctuations arising from the antisymmetric combination of density fluctuations in two layers. The drag rate is found to be proportional to $T^{4/3}$ for $T$ less than an energy scale $\Omega_{cr}$ which depends on the spacing, $d$, between the layers. An observation of a $T^{4/3}$ temperature dependence in the transresistance would be a strong evidence for the existence of the gauge field fluctuations.

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