Stich, D. and Zhou, J. and Korn, T. and Schulz, R. and Schuh, D. and Wegscheider, W. and Wu, M. W. and Schueller, C. (2007) Effect of initial spin polarization on spin dephasing and the electron g factor in a high-mobility two-dimensional electron system. PHYSICAL REVIEW LETTERS, 98 (17): 176401. ISSN 0031-9007, 1079-7114
Full text not available from this repository. (Request a copy)Abstract
We have investigated the spin dynamics of a high-mobility two-dimensional electron system (2DES) in a GaAs-Al0.3Ga0.7As single quantum well by time-resolved Faraday rotation in dependence on the initial degree of spin polarization, P, of the 2DES. From P similar to 0 to P similar to 30%, we observe an increase of the spin dephasing time, T-2*, by an order of magnitude, from about 20 ps to 200 ps, in good agreement with theoretical predictions by Weng and Wu [Phys. Rev. B 68, 075312 (2003)]. Furthermore, also the electron g factor is found to decrease for increasing P. Fully microscopic calculations reproduce the most salient features of the experiments, i.e., a dramatic decrease of spin dephasing and a moderate decrease of the electron g factor with increasing P. We show that both results are determined dominantly by the Hartree-Fock contribution of the Coulomb interaction.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | GAAS(110) QUANTUM-WELLS; RELAXATION; MECHANISM; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group Christian Schüller |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2020 10:57 |
| Last Modified: | 14 Dec 2020 10:57 |
| URI: | https://pred.uni-regensburg.de/id/eprint/32870 |
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