Spin relaxation time, spin dephasing time and ensemble spin dephasing time in $n$-type GaAs quantum wells

Details Spin relaxation time, spin dephasing time and ensemble spin dephasing time in $n$-type GaAs quantum wells Spin relaxation time, spin dephasing time and ensemble spin dephasing time in $n$-type GaAs quantum wells

2006-10-18

arxiv.org/abs/cond-mat/0610501v2

Phye. Lett. A 365, 501 (2007).

Physics

Condensed Matter

Materials Science

4 pages, 2 figures, to be published in Phys. Lett. A

Scientific paper

10.1016/j.physleta.2007.02.030

We investigate the spin relaxation and spin dephasing of $n$-type GaAs quantum wells. We obtain the spin relaxation time $T_1$, the spin dephasing time $T_2$ and the ensemble spin dephasing time $T_2^{\ast}$ by solving the full microscopic kinetic spin Bloch equations, and we show that, analogous to the common sense in an isotropic system for conduction electrons, $T_1$, $T_2$ and $T_2^{\ast}$ are identical due to the short correlation time. The inhomogeneous broadening induced by the D'yakonov-Perel term is suppressed by the scattering, especially the Coulomb scattering, in this system.

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