Nichele, Fabrizio and Chesi, Stefano and Hennel, Szymon and Wittmann, Angela and Gerl, Christian and Wegscheider, Werner and Loss, Daniel and Ihn, Thomas and Ensslin, Klaus (2014) Characterization of Spin-Orbit Interactions of GaAs Heavy Holes Using a Quantum Point Contact. PHYSICAL REVIEW LETTERS, 113 (4): 046801. ISSN 0031-9007, 1079-7114
Full text not available from this repository. (Request a copy)Abstract
We present transport experiments performed in high-quality quantum point contacts embedded in a GaAs two-dimensional hole gas. The strong spin-orbit interaction results in peculiar transport phenomena, including the previously observed anisotropic Zeeman splitting and level-dependent effective g factors. Here we find additional effects, namely, the crossing and the anticrossing of spin-split levels depending on subband index and magnetic field direction. Our experimental observations are reconciled in a heavy-hole effective spin-orbit Hamiltonian where cubic- and quadratic-in-momentum terms appear. The spin-orbit components, being of great importance for quantum computing applications, are characterized in terms of magnitude and spin structure. In light of our results, we explain the level-dependent effective g factor in an in-plane field. Through a tilted magnetic field analysis, we show that the quantum point contact out-of-plane g factor saturates around the predicted 7.2 bulk value.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | 2-DIMENSIONAL ELECTRON; SYSTEMS; WELLS; |
| 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: | 30 Sep 2019 14:07 |
| Last Modified: | 30 Sep 2019 14:07 |
| URI: | https://pred.uni-regensburg.de/id/eprint/9870 |
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