Interaction-Induced Enhancement of Spin-Orbit Coupling in Two-Dimensional Electronic System

Details Interaction-Induced Enhancement of Spin-Orbit Coupling in Two-Dimensional Electronic System Interaction-Induced Enhancement of Spin-Orbit Coupling in Two-Dimensional Electronic System

1998-12-04

arxiv.org/abs/cond-mat/9812083v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

18 pages, 2 figures, REVTeX

Scientific paper

10.1103/PhysRevB.60.4826

We study theoretically the renormalization of the spin-orbit coupling constant of two-dimensional electrons by electron-electron interactions. We demonstrate that, similarly to the $g$ factor, the renormalization corresponds to the enhancement, although the magnitude of the enhancement is weaker than that for the $g$ factor. For high electron concentrations (small interaction parameter $r_s$) the enhancement factor is evaluated analytically within the static random phase approximation. For large $r_s\sim 10$ we use an approximate expression for effective electron-electron interaction, which takes into account the local field factor, and calculate the enhancement numerically. We also study the interplay between the interaction-enhanced Zeeman splitting and interaction-enhanced spin-orbit coupling.

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