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Electron Spin Dynamics in Semiconductors without Inversion Symmetry

Vadim I. Puller·Lev G. Mourokh·Anatoly Yu. Smirnov·Norman J. M. Horing
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Abstract

We present a microscopic analysis of electron spin dynamics in the presence of an external magnetic field for non-centrosymmetric semiconductors in which the D'yakonov-Perel' spin-orbit interaction is the dominant spin relaxation mechanism. We implement a fully microscopic two-step calculation, in which the relaxation of orbital motion due to electron-bath coupling is the first step and spin relaxation due to spin-orbit coupling is the second step. On this basis, we derive a set of Bloch equations for spin with the relaxation times T_1 and T_2 obtained microscopically. We show that in bulk semiconductors without magnetic field, T_1 = T_2, whereas for a quantum well with a magnetic field applied along the growth direction T_1 = T_2/2 for any magnetic field strength.

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Vadim I. Puller, Lev G. Mourokh, Anatoly Yu. Smirnov, Norman J. M. Horing. 2002-08-13. Electron Spin Dynamics in Semiconductors without Inversion Symmetry. https://doi.org/10.1142/9789812705556_0009

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