Hot-electron effect in spin dephasing in $n$-type GaAs quantum wells

Details Hot-electron effect in spin dephasing in $n$-type GaAs quantum wells Hot-electron effect in spin dephasing in $n$-type GaAs quantum wells

2004-01-08

arxiv.org/abs/cond-mat/0401113v2

Phys. Rev. B 69, 245320 (2004)

Physics

Condensed Matter

Other Condensed Matter

11 pages, 11 figures, accepted for publication in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.69.245320

We perform a study of the effect of the high in-plane electric field on the spin precession and spin dephasing due to the D'yakonov-Perel' mechanism in $n$-type GaAs (100) quantum wells by constructing and numerically solving the kinetic Bloch equations. We self-consistently include all of the scattering such as electron-phonon, electron-non-magnetic impurity as well as the electron-electron Coulomb scattering in our theory and systematically investigate how the spin precession and spin dephasing are affected by the high electric field under various conditions. The hot-electron distribution functions and the spin correlations are calculated rigorously in our theory. It is found that the D'yakonov-Perel' term in the electric field provides a non-vanishing effective magnetic field that alters the spin precession period. Moreover, spin dephasing is markedly affected by the electric field. The important contribution of the electron-electron scattering to the spin dephasing is also discussed.

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