Buchner, M. and Kuczmik, T. and Oltscher, M. and Ciorga, M. and Korn, T. and Loher, J. and Schuh, D. and Schueller, C. and Bougeard, D. and Weiss, D. and Back, C. H. (2017) Optical investigation of electrical spin injection into an inverted two-dimensional electron gas structure. PHYSICAL REVIEW B, 95 (3): 035304. ISSN 2469-9950, 2469-9969
Full text not available from this repository.Abstract
We report on electrical spin injection from (Ga, Mn) As into a high-mobility two-dimensional electron gas confined at an (Al, Ga) As/GaAs interface. Besides standard nonlocal electrical detection, we use amagneto-optical approach which provides cross-sectional images of the spin accumulation at the cleaved edge of the sample, yielding spin decay lengths on the order of 2 mu m. In some cases we find a nonmonotonic bias voltage dependence of the spin signal, which may be linked to ballistic tunneling effects during spin injection. We observe a clear Hanle depolarization using a technique which is free of dynamic nuclear polarization effects. Fitting the data with the standard drift-diffusion model of spin injection suggests averaged in-plane spin lifetimes on the order of 1 ns.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | QUANTUM-WELLS; ALXGA1-XAS ALLOYS; PERSISTENT PHOTOCONDUCTIVITY; RELAXATION ANISOTROPY; COULOMB DRAG; SEMICONDUCTOR; GAAS; FIELD; PHOTOLUMINESCENCE; DIFFUSION; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Back > Group Christian Back Physics > Institute of Experimental and Applied Physics > Chair Professor Huber > Group Dominique Bougeard Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group Christian Schüller Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2018 13:01 |
| Last Modified: | 27 Feb 2019 11:09 |
| URI: | https://pred.uni-regensburg.de/id/eprint/559 |
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