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Frictional Coulomb drag in strong magnetic fields

M. C. Bonsager·K. Flensberg·B. Y-K. Hu·A. -P. Jauho
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Abstract

A treatment of frictional Coulomb drag between two 2-dimensional electron layers in a strong perpendicular magnetic field, within the independent electron picture, is presented. Assuming fully resolved Landau levels, the linear response theory expression for the transresistivity $ρ_{21}$ is evaluated using diagrammatic techniques. The transresistivity is given by an integral over energy and momentum transfer weighted by the product of the screened interlayer interaction and the phase-space for scattering events. We demonstrate, by a numerical analysis of the transresistivity, that for well-resolved Landau levels the interplay between these two factors leads to characteristic features in both the magnetic field- and the temperature dependence of $ρ_{21}$. Numerical results are compared with recent experiments.

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M. C. Bonsager, K. Flensberg, B. Y-K. Hu, A. -P. Jauho. 1997-04-28. Frictional Coulomb drag in strong magnetic fields. https://doi.org/10.1103/physrevb.56.10314

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