Nichele, Fabrizio and Pal, Atindra Nath and Winkler, Roland and Gerl, Christian and Wegscheider, Werner and Ihn, Thomas and Ensslin, Klaus (2014) Spin-orbit splitting and effective masses in p-type GaAs two-dimensional hole gases. PHYSICAL REVIEW B, 89 (8): 081306. ISSN 1098-0121, 1550-235X
Full text not available from this repository. (Request a copy)Abstract
We present magnetotransport measurements performed on two-dimensional hole gases embedded in carbon doped p-type GaAs/AlGaAs heterostructures grown on [001] oriented substrates. A pronounced beating pattern in the Shubnikov-de Haas oscillations proves the presence of strong spin-orbit interaction in the device under study. We estimate the effective masses of spin-orbit-split subbands by measuring the temperature dependence of the Shubnikov-de Haas oscillations at different hole densities. While the lighter heavy-hole effective mass is not energy dependent, the heavier heavy-hole effective mass has a prominent energy dependence, indicating a strong spin-orbit induced nonparabolicity of the valence band. The measured effective masses show qualitative agreement with self-consistent numerical calculations.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | HETEROSTRUCTURES; TRANSPORT; ELECTRONS; FIELD; |
| 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: | 26 Nov 2019 14:48 |
| Last Modified: | 26 Nov 2019 14:48 |
| URI: | https://pred.uni-regensburg.de/id/eprint/10657 |
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