Comment on "Spin relaxation in quantum Hall systems"
Abstract
W. Apel and Yu.A. Bychkov have recently considered the spin relaxation in a 2D quantum Hall system for the filling factor close to unity [PRL v.82, 3324 (1999)]. The authors considered only one spin flip mechanism (direct spin-phonon coupling) among several possible spin-orbit related ones and came to the conclusion that the spin relaxation time due to this mechanism is quite short: around s at B=10 T (for GaAs). This time is much shorter than the typical time ( s) obtained earlier by D. Frenkel while considering the spin relaxation of 2D electrons in a quantizing magnetic field without the Coulomb interaction and for the same spin-phonon coupling. I show that the authors' conclusion about the value of the spin-flip time is wrong and have deduced the correct time which is by several orders of magnitude longer. I also discuss the admixture mechanism of the spin-orbit interaction.
Cite
@article{arxiv.cond-mat/0005522,
title = {Comment on "Spin relaxation in quantum Hall systems"},
author = {Alexander V. Khaetskii},
journal= {arXiv preprint arXiv:cond-mat/0005522},
year = {2009}
}
Comments
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