Kammermeier, Michael and Wenk, Paul and Dirnberger, Florian and Bougeard, Dominique and Schliemann, John (2018) Spin relaxation in wurtzite nanowires. PHYSICAL REVIEW B, 98 (3): 035407. ISSN 2469-9950, 2469-9969
Full text not available from this repository. (Request a copy)Abstract
We theoretically investigate the D'yakonov-Perel' spin-relaxation properties in diffusive wurtzite semiconductor nanowires and their impact on the quantum correction to the conductivity. Although the lifetime of the long-lived spin states is limited by the dominant k-linear spin-orbit contributions in the bulk, these terms show almost no effect in the finite-size nanowires. Here, the spin lifetime is essentially determined by the small k-cubic spin-orbit terms and nearly independent of the wire radius. At the same time, these states possess in general a complex helical structure in real space that is modulated by the spin-precession length induced by the k-linear terms. For this reason, the experimentally detected spin relaxation largely depends on the ratio between the nanowire radius and the spin-precession length as well as the type of measurement. In particular, it is shown that while a variation of the radius hardly affects the magnetoconductance correction, which is governed by the long-lived spin states, the change in the spin lifetime observed in optical experiments can be dramatic. We compare our results with recent experimental studies on wurtzite InAs nanowires.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ORBIT INTERACTION; SEMICONDUCTOR NANOWIRE; QUANTUM-WELLS; MAJORANA FERMIONS; MAGNETIC-FIELD; GAAS NANOWIRES; MAGNETORESISTANCE; SUPERCONDUCTOR; DYNAMICS; CHANNELS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics Physics > Institute of Theroretical Physics > Chair Professor Grifoni > Group John Schliemann |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 19 Feb 2020 09:49 |
| Last Modified: | 19 Feb 2020 09:49 |
| URI: | https://pred.uni-regensburg.de/id/eprint/14258 |
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