Frictional Coulomb drag in strong magnetic fields

Details Frictional Coulomb drag in strong magnetic fields Frictional Coulomb drag in strong magnetic fields

1997-04-28

arxiv.org/abs/cond-mat/9704232v1

Phys. Rev. B 56, 10314 (1997).

Physics

Condensed Matter

RevTeX, 34 pages, 8 figures included in text

Scientific paper

10.1103/PhysRevB.56.10314

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 $\rho_{21}$ 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 $\rho_{21}$. Numerical results are compared with recent experiments.

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