Spin relaxation in the presence of electron-electron interactions

Details Spin relaxation in the presence of electron-electron interactions Spin relaxation in the presence of electron-electron interactions

2006-01-05

arxiv.org/abs/cond-mat/0601105v1

PRL 96, 057202 (2006)

Physics

Condensed Matter

Disordered Systems and Neural Networks

To appear in Phys. Rev. Lett. (2006)

Scientific paper

10.1103/PhysRevLett.96.057202

The D'yakonov-Perel' spin relaxation induced by the spin-orbit interaction is examined in disordered two-dimensional electron gas. It is shown that, because of the electron-electron interactions different spin relaxation rates can be obtained depending on the techniques used to extract them. It is demonstrated that the relaxation rate of a spin population is proportional to the spin-diffusion constant D_s, while the spin-orbit scattering rate controlling the weak-localization corrections is proportional to the diffusion constant D, i.e., the conductivity. The two diffusion constants get strongly renormalized by the electron-electron interactions, but in different ways. As a result, the corresponding relaxation rates are different, with the difference between the two being especially strong near a magnetic instability or near the metal-insulator transition.

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