Olbrich, P. and Zoth, C. and Lutz, P. and Drexler, C. and Bel'kov, V. V. and Terent'ev, Ya. V. and Tarasenko, S. A. and Semenov, A. N. and Ivanov, S. V. and Yakovlev, D. R. and Wojtowicz, T. and Wurstbauer, U. and Schuh, D. and Ganichev, S. D. (2012) Spin-polarized electric currents in diluted magnetic semiconductor heterostructures induced by terahertz and microwave radiation. PHYSICAL REVIEW B, 86 (8): 085310. ISSN 2469-9950, 2469-9969
Full text not available from this repository.Abstract
We report on the study of spin-polarized electric currents in diluted magnetic semiconductor (DMS) quantum wells subjected to an in-plane external magnetic field and illuminated by microwave or terahertz radiation. The effect is studied in (Cd, Mn)Te/(Cd, Mg)Te quantum-wells (QWs) and (In, Ga)As/InAlAs:Mn QWs belonging to the well-known II-VI and III-V DMS material systems, as well as in heterovalent AlSb/InAs/(Zn,Mn) Te QWs, which represent a promising combination of II-VI and III-V semiconductors. Experimental data and developed theory demonstrate that the photocurrent originates from a spin-dependent scattering of free carriers by static defects or phonons in the Drude absorption of radiation and subsequent relaxation of carriers. We show that in DMS structures, the efficiency of the current generation is drastically enhanced compared to nonmagnetic semiconductors. The enhancement is caused by the exchange interaction of carrier spins with localized spins of magnetic ions resulting, on the one hand, in the giant Zeeman spin splitting, and, on the other hand, in the spin-dependent carrier scattering by localized Mn2+ ions polarized by an external magnetic field.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | III-V SEMICONDUCTORS; CYCLOTRON-RESONANCE; QUANTUM-WELLS; MAGNETOTRANSPORT; SPINTRONICS; DYNAMICS; HOLES; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics Physics > Institute of Experimental and Applied Physics > Professor Ganichev > Group Sergey Ganichev |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 07 May 2020 06:20 |
| Last Modified: | 07 May 2020 06:20 |
| URI: | https://pred.uni-regensburg.de/id/eprint/18291 |
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