Spin Coulomb drag beyond the random phase approximation

Details Spin Coulomb drag beyond the random phase approximation Spin Coulomb drag beyond the random phase approximation

2007-06-11

arxiv.org/abs/0706.1403v2

Phys. Rev. Lett. 100, 016603 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 figures, accepted for publication in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.100.016603

We study the spin Coulomb drag in a quasi-two-dimensional electron gas 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 \textit{et al.}, Nature, \textbf{437}, 1330 (2005).

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