Griesbeck, M. and Glazov, M. M. and Korn, T. and Sherman, E. Ya. and Waller, D. and Reichl, C. and Schuh, D. and Wegscheider, W. and Schueller, C. (2009) Cyclotron effect on coherent spin precession of two-dimensional electrons. PHYSICAL REVIEW B, 80 (24): 241314. ISSN 1098-0121,
Full text not available from this repository. (Request a copy)Abstract
We investigate the spin dynamics of high-mobility two-dimensional electrons in GaAs/AlGaAs quantum wells grown along the [001] and [110] directions by time-resolved Faraday rotation at low temperatures. In measurements on the (001)-grown structures without external magnetic fields, we observe coherent oscillations of the electron-spin polarization about the effective spin-orbit field. In nonquantizing magnetic fields applied normal to the sample plane, the cyclotron motion of the electrons rotates the effective spin-orbit field. This rotation leads to fast oscillations in the spin polarization about a nonzero value and a strong increase in the spin dephasing time in our experiments. These two effects are absent in the (110)-grown structure due to the different symmetry of its effective spin-orbit field. The measurements are in excellent agreement with our theoretical model.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | GAAS(110) QUANTUM-WELLS; RELAXATION; SEMICONDUCTORS; SPINTRONICS; ORIENTATION; ANISOTROPY; COLLISIONS; MECHANISM; GAS; aluminium compounds; electron mobility; electron spin polarisation; Faraday effect; gallium arsenide; III-V semiconductors; semiconductor growth; semiconductor quantum wells; spin dynamics; spin-orbit interactions |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Werner Wegscheider |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 31 Aug 2020 10:01 |
| Last Modified: | 31 Aug 2020 10:01 |
| URI: | https://pred.uni-regensburg.de/id/eprint/28083 |
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