Dynamical correlations in Coulomb drag effect

doi:10.1016/S1386-9477(02)01069-X

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Date Issued

2003

Author

Tanatar, B.

Davoudi, B.

Hu, B.Y.-K.

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http://hdl.handle.net/11693/27539

Journal

Physica E: Low-Dimensional Systems and Nanostructures

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http://dx.doi.org/10.1016/S1386-9477(02)01069-X

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Conference Paper [2294]

Abstract

Motivated by recent Coulomb drag experiments in pairs of low-density two-dimensional (2D) electron gases, we investigate the influence of correlation effects on the interlayer drag rate as a function of temperature. We use the self-consistent field method to calculate the intra and interlayer local-field factors Gij(q,T) which embody the short-range correlation effects. We calculate the transresistivity using the screened effective interlayer interactions that result from incorporating these local-field factors within various approximation schemes. Our results suggest that dynamic (frequency dependent) correlations play an important role in enhancing the Coulomb drag rate. © 2003 Elsevier Science B.V. All rights reserved.