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Title: Hole spin dephasing in p-type semiconductor quantum wells

Abstract

Hole spin dephasing time due to the D'yakonov-Perel' mechanism in p-type GaAs (100) quantum wells with well separated light-hole and heavy-hole bands is studied by constructing and numerically solving the kinetic spin Bloch equations. We include all the spin-conserving scattering such as the hole-phonon and the hole-nonmagnetic impurity as well as the hole-hole Coulomb scattering in our calculation. Different effects such as the temperature, the hole density, the impurity density and the Rashba coefficient on the spin dephasing are investigated in detail. We also show that the Coulomb scattering makes a marked contribution to the spin dephasing. The spin dephasing time can either increase or decrease with temperature, hole/impurity density or the inclusion of the Coulomb scattering depending on the relative importance of the spin-orbit coupling and the scattering. It is also shown that due to the different spin-orbit coupling strengths, many spin dephasing properties of holes are quite different from those of electrons.

Authors:
;  [1];  [2];  [1]
  1. Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui, 230026 (China)
  2. (China)
Publication Date:
OSTI Identifier:
20788028
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. B, Condensed Matter and Materials Physics; Journal Volume: 73; Journal Issue: 12; Other Information: DOI: 10.1103/PhysRevB.73.125314; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BLOCH EQUATIONS; COULOMB SCATTERING; DENSITY; ELECTRONS; GALLIUM ARSENIDES; HOLES; IMPURITIES; L-S COUPLING; N-TYPE CONDUCTORS; PHONONS; QUANTUM WELLS; SPIN

Citation Formats

Lue, C., Wu, M. W., Department of Physics, University of Science and Technology of China, Hefei, Anhui, 230026, and Cheng, J. L. Hole spin dephasing in p-type semiconductor quantum wells. United States: N. p., 2006. Web. doi:10.1103/PHYSREVB.73.1.
Lue, C., Wu, M. W., Department of Physics, University of Science and Technology of China, Hefei, Anhui, 230026, & Cheng, J. L. Hole spin dephasing in p-type semiconductor quantum wells. United States. doi:10.1103/PHYSREVB.73.1.
Lue, C., Wu, M. W., Department of Physics, University of Science and Technology of China, Hefei, Anhui, 230026, and Cheng, J. L. Wed . "Hole spin dephasing in p-type semiconductor quantum wells". United States. doi:10.1103/PHYSREVB.73.1.
@article{osti_20788028,
title = {Hole spin dephasing in p-type semiconductor quantum wells},
author = {Lue, C. and Wu, M. W. and Department of Physics, University of Science and Technology of China, Hefei, Anhui, 230026 and Cheng, J. L.},
abstractNote = {Hole spin dephasing time due to the D'yakonov-Perel' mechanism in p-type GaAs (100) quantum wells with well separated light-hole and heavy-hole bands is studied by constructing and numerically solving the kinetic spin Bloch equations. We include all the spin-conserving scattering such as the hole-phonon and the hole-nonmagnetic impurity as well as the hole-hole Coulomb scattering in our calculation. Different effects such as the temperature, the hole density, the impurity density and the Rashba coefficient on the spin dephasing are investigated in detail. We also show that the Coulomb scattering makes a marked contribution to the spin dephasing. The spin dephasing time can either increase or decrease with temperature, hole/impurity density or the inclusion of the Coulomb scattering depending on the relative importance of the spin-orbit coupling and the scattering. It is also shown that due to the different spin-orbit coupling strengths, many spin dephasing properties of holes are quite different from those of electrons.},
doi = {10.1103/PHYSREVB.73.1},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 12,
volume = 73,
place = {United States},
year = {Wed Mar 15 00:00:00 EST 2006},
month = {Wed Mar 15 00:00:00 EST 2006}
}