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Precession and motional slowing of spin evolution in a high mobility two-dimensional electron gas

Precession and motional slowing of spin evolution in a high mobility two-dimensional electron gas
Precession and motional slowing of spin evolution in a high mobility two-dimensional electron gas
Optical spin-dynamic measurements in a high-mobility n-doped GaAs/AlGaAs quantum well show oscillatory evolution at 1.8 K consistent with a quasi-collision-free D’yakonov-Perel’-Kachorovskii regime. Above 5 K evolution becomes exponential as expected for collision-dominated spin dynamics. Momentum scattering times extracted from Hall mobility and Monte Carlo simulation of spin polarization agree at 1.8 K but diverge at higher temperatures, indicating the importance of electron-electron scattering and an intrinsic upper limit for the spin-relaxation rate.
0031-9007
236601
Brand, M.A.
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Malinowski, A.
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Karimov, O.Z.
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Marsden, P.A.
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Harley, R.T.
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Shields, A.J.
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Sanvitto, D.
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Ritchie, D.A.
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Simmons, M.Y.
afb0d316-8916-4911-a356-14182e79545e
Brand, M.A.
cb12b5d6-fd96-4aa8-86b5-1f9ed2a96483
Malinowski, A.
54fd31d4-b510-4726-a8cd-33b6b2ad0427
Karimov, O.Z.
e5137e05-4b16-484e-aae8-952a6fd69da4
Marsden, P.A.
4a0ef10a-358b-4b0f-95b2-c314731712aa
Harley, R.T.
54613031-f60f-45f4-9b20-e49bcfd53b77
Shields, A.J.
2d016dc0-78a3-4368-9f54-49b00f381a2d
Sanvitto, D.
78c820d7-04fe-4970-a87c-bd5ec607f7b9
Ritchie, D.A.
83562b7e-0986-4822-9cfe-8c4ac95596c7
Simmons, M.Y.
afb0d316-8916-4911-a356-14182e79545e

Brand, M.A., Malinowski, A., Karimov, O.Z., Marsden, P.A., Harley, R.T., Shields, A.J., Sanvitto, D., Ritchie, D.A. and Simmons, M.Y. (2002) Precession and motional slowing of spin evolution in a high mobility two-dimensional electron gas. Physical Review Letters, 89 (23), 236601. (doi:10.1103/PhysRevLett.89.236601).

Record type: Article

Abstract

Optical spin-dynamic measurements in a high-mobility n-doped GaAs/AlGaAs quantum well show oscillatory evolution at 1.8 K consistent with a quasi-collision-free D’yakonov-Perel’-Kachorovskii regime. Above 5 K evolution becomes exponential as expected for collision-dominated spin dynamics. Momentum scattering times extracted from Hall mobility and Monte Carlo simulation of spin polarization agree at 1.8 K but diverge at higher temperatures, indicating the importance of electron-electron scattering and an intrinsic upper limit for the spin-relaxation rate.

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Published date: 18 November 2002
Organisations: Optoelectronics Research Centre, Physics & Astronomy

Identifiers

Local EPrints ID: 37689
URI: http://eprints.soton.ac.uk/id/eprint/37689
ISSN: 0031-9007
PURE UUID: 20362339-e968-46cc-9c0f-761222d8653b

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Date deposited: 25 May 2006
Last modified: 11 Oct 2021 16:31

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Contributors

Author: M.A. Brand
Author: A. Malinowski
Author: O.Z. Karimov
Author: P.A. Marsden
Author: R.T. Harley
Author: A.J. Shields
Author: D. Sanvitto
Author: D.A. Ritchie
Author: M.Y. Simmons

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