Cheng, J. L. and Rioux, J. and Fabian, J. and Sipe, J. E. (2011) Theory of optical spin orientation in silicon. PHYSICAL REVIEW B, 83 (16): 165211. ISSN 2469-9950, 2469-9969
Full text not available from this repository. (Request a copy)Abstract
We theoretically investigate the indirect optical injection of carriers and spins in bulk silicon, using an empirical pseudopotential description of electron states and an adiabatic bond charge model for phonon states. We identify the selection rules, the contribution to the carrier and spin injection in each conduction band valley from each phonon branch and each valence band, and the temperature dependence of these processes. The transition from the heavy hole band to the lowest conduction band dominates the injection due to the large joint density of states. For incident light propagating along the [00 (1) over bar] direction, the injection rates and the degree of spin polarization of injected electrons show strong valley anisotropy. The maximum degree of spin polarization is at the injection edge with values 25% at low temperature and 15% at high temperature.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DELTA-ELECTRON-PHONON; TEMPERATURE-DEPENDENCE; MATRIX-ELEMENTS; PSEUDOPOTENTIAL CALCULATIONS; ENERGY-GAP; SI; ABSORPTION; SEMICONDUCTORS; GE; SPINTRONICS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Jaroslav Fabian |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 22 Jun 2020 09:03 |
| Last Modified: | 22 Jun 2020 09:03 |
| URI: | https://pred.uni-regensburg.de/id/eprint/20926 |
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