Marchetti, Gionni and D'Amico, Irene orcid.org/0000-0002-4794-1348 (2017) Effect of ionized impurity screening on spin decoherence at low and intermediate temperatures in GaAs. Physica status solidi (b). ISSN 1521-3951
Abstract
We study the effect of charged impurity screening on spin decoherence in bulk n-type GaAs, and analyze in details the effect of the use of different Born approximations applied to a linearized Thomas-Fermi screening theory. The spin relaxation times are calculated by ensemble Monte Carlo techniques, including electron-electron, electron-impurities, and electron-phonons scattering. We carefully choose a parameter region so that all the physical approximations hold, and, in particular, a Yukawa-type potential can be used to describe the screened Coulomb interaction and the Born series converges. Our results show that including the second order Born approximation yields much shorter spin relaxation times compared to the commonly implemented first Born approximation: spin relaxation times may be reduced by hundreds of picoseconds, with the first Born approximation overestimating results by 30% or more for a large region of parameters. Though our ensemble Monte Carlo simulations include electron-electron and electron-phonon interactions, when considering low to intermediate carrier densities and T > 50 K, but T smaller than the Fermi temperature, our results are in good agreement with Dyakonov-Perel theory when this includes electron-impurity interactions only, which supports this to be the most relevant scattering mechanism for bulk GaAs in this low-intermediate temperature regime.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 WILEY-VCH Verlag GmbH & Co. KGaA. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details |
Keywords: | GaAs,Ionized impurity screening,Monte Carlo simulations,Spin decoherence,Spintronics |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 02 May 2017 08:40 |
Last Modified: | 16 Oct 2024 13:44 |
Published Version: | https://doi.org/10.1002/pssb.201600806 |
Status: | Published online |
Refereed: | Yes |
Identification Number: | 10.1002/pssb.201600806 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:115877 |