Kammermeier, Michael and Wenk, Paul and Schliemann, John and Heedt, Sebastian and Gerster, Thomas and Schaepers, Thomas (2017) Magnetoconductance correction in zinc-blende semiconductor nanowires with spin-orbit coupling. PHYSICAL REVIEW B, 96 (23): 235302. ISSN 2469-9950, 2469-9969
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We study the effects of spin-orbit coupling on the magnetoconductivity in diffusive cylindrical semiconductor nanowires. Following up on our former study on tubular semiconductor nanowires, we focus in this paper on nanowire systems where no surface accumulation layer is formed but instead the electron wave function extends over the entire cross section. We take into account the Dresselhaus spin-orbit coupling resulting from a zinc-blende lattice and the Rashba spin-orbit coupling, which is controlled by a lateral gate electrode. The spin relaxation rate due to Dresselhaus spin-orbit coupling is found to depend neither on the spin density component nor on the wire growth direction and is unaffected by the radial boundary. In contrast, the Rashba spin relaxation rate is strongly reduced for a wire radius that is smaller than the spin precession length. The derived model is fitted to the data of magnetoconductance measurements of a heavily doped back-gated InAs nanowire and transport parameters are extracted. At last, we compare our results to previous theoretical and experimental studies and discuss the occurring discrepancies.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FIELD-EFFECT TRANSISTOR; WEAK-LOCALIZATION; 2-DIMENSIONAL ELECTRONS; MAGNETIC-FIELD; QUANTUM-WELLS; MAGNETORESISTANCE; HETEROSTRUCTURES; GROWTH; WIRES; METAL; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Grifoni > Group John Schliemann |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2018 13:18 |
| Last Modified: | 28 Feb 2019 10:05 |
| URI: | https://pred.uni-regensburg.de/id/eprint/1701 |
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