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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
; | | Date: |
13 Aug 2002 | | Subject: | cond-mat | | 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. | | Source: | arXiv, cond-mat/0208261 | | Services: | Forum | Review | PDF | Favorites | |
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