Kammermeier, Michael and Wenk, Paul and Schliemann, John and Heedt, Sebastian and Schaepers, Thomas (2016) Weak (anti)localization in tubular semiconductor nanowires with spin-orbit coupling. PHYSICAL REVIEW B, 93 (20): 205306. ISSN 2469-9950, 2469-9969
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We compute analytically the weak (anti) localization correction to the Drude conductivity for electrons in tubular semiconductor systems of zinc-blende type. We include linear Rashba and Dresselhaus spin-orbit coupling (SOC) and compare wires of standard growth directions < 100 >, < 111 >, and < 110 >. The motion on the quasi-two-dimensional surface is considered diffusive in both directions: transversal as well as along the cylinder axis. It is shown that Dresselhaus and Rashba SOC similarly affect the spin relaxation rates. For the < 110 > growth direction, the long-lived spin states are of helical nature. We detect a crossover from weak localization to weak antilocalization depending on spin-orbit coupling strength as well as dephasing and scattering rate. The theory is fitted to experimental data of an undoped < 111 > InAs nanowire device which exhibits a top-gate-controlled crossover from positive to negative magnetoconductivity. Thereby, we extract transport parameters where we quantify the distinct types of SOC individually.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | 2D ELECTRON-GAS; INAS NANOWIRES; QUANTUM-WELLS; MAGNETORESISTANCE; ANTILOCALIZATION; HETEROSTRUCTURES; GROWTH; RINGS; FIELD; GAAS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 18 Mar 2019 09:17 |
| Last Modified: | 18 Mar 2019 09:17 |
| URI: | https://pred.uni-regensburg.de/id/eprint/2928 |
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