Finite Width and Local Field Corrections to Spin Coulomb Drag in a Quasi-Two-Dimensional Electron Gas

S. M. Badalyan, C. S. Kim, and G. Vignale

Phys. Rev. Lett. 100, 016603 – Published 9 January 2008

Abstract

We study the spin Coulomb drag in a quasi-two-dimensional electron gas of finite transverse width, including local field corrections beyond the random phase approximation (RPA). We find that the finite transverse width of the electron gas causes a significant reduction of the spin Coulomb drag. This reduction, however, is largely compensated by the enhancement coming from the inclusion of many-body local field effects beyond the RPA, thereby restoring good agreement with the experimental observations by C. P. Weber et al. [Nature (London) 437, 1330 (2005)].

Received 11 June 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.016603

Authors & Affiliations

S. M. Badalyan^1,2,*, C. S. Kim³, and G. Vignale⁴

¹Department of Radiophysics, Yerevan State University, 1 A. Manoukian St., Yerevan 375025, Armenia
²Department of Physics, University of Regensburg, 93040 Regensburg, Germany
³Department of Physics and Institute for Condensed Matter Theory, Chonnam National University, Gwangju 500-757, Korea
⁴Department of Physics and Astronomy, University of Missouri-Columbia, Missouri 65211, USA

^*Samvel.Badalyan@physik.uni-regensburg.de

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Vol. 100, Iss. 1 — 11 January 2008

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