Olbrich, P. and Allerdings, J. and Bel'kov, V. V. and Tarasenko, S. A. and Schuh, D. and Wegscheider, W. and Korn, T. and Schueller, C. and Weiss, D. and Ganichev, S. D. (2009) Magnetogyrotropic photogalvanic effect and spin dephasing in (110)-grown GaAs/AlxGa1-xAs quantum well structures. PHYSICAL REVIEW B, 79 (24): 245329. ISSN 1098-0121,
Full text not available from this repository.Abstract
We report the magnetogyrotropic photogalvanic effect (MPGE) in n-doped (110)-grown GaAs/AlGaAs quantum-well (QW) structures caused by free-carrier absorption of terahertz radiation in the presence of a magnetic field. The photocurrent behavior upon variation in the radiation-polarization state, magnetic field orientation, and temperature is studied. The developed theory of MPGE describes well all experimental results. It is demonstrated that the structure inversion asymmetry can be controllably tuned to zero by variation in the delta-doping layer positions. For the in-plane magnetic field the photocurrent is only observed in asymmetric structures but vanishes in symmetrically doped QWs. Applying time-resolved Kerr rotation and polarized luminescence we investigate the spin relaxation in QWs for various excitation levels. Our data confirm that in symmetrically doped QWs the spin-relaxation time is maximal; therefore, these structures set the upper limit of spin dephasing in GaAs/AlGaAs QWs.</p>.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ELECTRON-GAS; RELAXATION; GAAS; aluminium compounds; gallium arsenide; gallium compounds; III-V semiconductors; optical Kerr effect; photoconductivity; photoluminescence; semiconductor quantum wells; spin dynamics; time resolved spectra; wide band gap semiconductors |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Professor Ganichev > Group Sergey Ganichev Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Werner Wegscheider Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Sep 2020 13:07 |
| Last Modified: | 14 Sep 2020 13:07 |
| URI: | https://pred.uni-regensburg.de/id/eprint/28922 |
Actions (login required)
 |
View Item |
