Gelfert, S. and Frankerl, C. and Reichl, C. and Schuh, D. and Salis, G. and Wegscheider, W. and Bougeard, D. and Korn, T. and Schueller, C. (2020) Inelastic light scattering by intrasubband spin-density excitations in GaAs-AlGaAs quantum wells with balanced Bychkov-Rashba and Dresselhaus spin-orbit interaction: Quantitative determination of the spin-orbit field. PHYSICAL REVIEW B, 101 (3): 035427. ISSN 2469-9950, 2469-9969
Full text not available from this repository. (Request a copy)Abstract
Inelastic light scattering experiments on low-energy intrasubband spin-density excitations (SDEs) are performed in (001)-grown modulation-doped GaAs-AlGaAs single quantum wells in in-plane external magnetic fields. The investigated samples possess balanced linear Bychkov-Rashba (alpha) and Dresselhaus (beta) spin-orbit strengths in two different configurations, alpha = beta and alpha = -beta Both configurations lead to an extreme anisotropy of the spin splitting of the conduction band, where the in-plane directions of maximum spin splitting for both configurations are perpendicular to each other. The spin splitting asymmetry can be directly detected via the SDE by breaking of the time-reversal symmetry due to transfer of a momentum q in the quantum-well plane. In addition, the application of an in-plane magnetic field B-ext perpendicular to q allows us to modulate the effective magnetic field. Via a numerical line-shape analysis of the experimental SDE spectra, we determine the relevant parameters of the samples. We find that the linear spin-orbit strength vertical bar alpha vertical bar = beta is comparable for both samples, while the electron g factors are markedly different. Furthermore, we experimentally quantify the values of the maximum internal spin-orbit fields, which are as high as B-so similar to 18 T for both samples.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SINGLE-PARTICLE EXCITATIONS; ELECTRON G-FACTOR; RAMAN-SCATTERING; ANISOTROPY; GAS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics Physics > Institute of Experimental and Applied Physics > Chair Professor Huber > Group Dominique Bougeard Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group Christian Schüller |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 01 Apr 2021 08:04 |
| Last Modified: | 01 Apr 2021 08:04 |
| URI: | https://pred.uni-regensburg.de/id/eprint/45307 |
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