Ganichev, Sergey D. and Roessler, Ulrich and Prettl, Wilhelm and Ivchenko, E. L. and Bel'kov, VV. and Neumann, R. and Brunner, K. and Abstreiter, G. (2002) Removal of spin degeneracy in p-SiGe quantum wells demonstrated by spin photocurrents. PHYSICAL REVIEW B, 66 (7): 075328. ISSN 2469-9950, 2469-9969
Full text not available from this repository.Abstract
Spin photocurrents requiring a system lacking inversion symmetry, become possible in SiGe based quantum well (QW) structures due to their built-in asymmetry. We report on circular and linear photogalvanic effects induced by infrared radiation in (001)- and (113)-oriented p-Si/Si1-xGex QW structures and analyze the observations in view of the possible symmetry of these structures. The circular photogalvanic effect arises due to optical spin orientation of free carriers in QW's with spin-split subbands. It results in a directed motion of free carriers in the plane of the QW. We discuss possible microscopic mechanisms that could remove the spin degeneracy of the electronic subband states.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ORIENTATION; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Alumni or Retired Professors > Group Ulrich Rössler Physics > Institute of Experimental and Applied Physics > Professor Ganichev > Group Sergey Ganichev Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Wilhelm Prettl |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 07 Sep 2021 05:19 |
| Last Modified: | 07 Sep 2021 05:19 |
| URI: | https://pred.uni-regensburg.de/id/eprint/39982 |
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