Regensburg 2016 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HL: Fachverband Halbleiterphysik
HL 4: Spintronics: Nanostructures and Optics
HL 4.4: Vortrag
Montag, 7. März 2016, 10:15–10:30, H13
Weak (Anti)Localization in Tubular Semiconductor Nanowires with Spin-Orbit Coupling — •Paul Wenk1, Michael Kammermeier1, John Schliemann1, Sebastian Heedt2, and Thomas Schäpers2 — 1Institut für Theoretische Physik, Universität Regensburg, 93040 Regensburg, Germany — 2Peter Grünberg Institute and JARA-Fundamentals of Future Information Technology, Forschungszentrum Jülich, 52425 Jülich, Germany
Motivated by recent experiments we compute analytically the quantum mechanical correction to the Drude conductivity in tubular semiconductor systems of zincblende type. Focusing on the lowest conduction band, we include linear Rashba and Dresselhaus spin-orbit coupling (SOC) and compare the results for nanorods of standard growth directions ⟨ 100 ⟩, ⟨ 111 ⟩ and ⟨ 110 ⟩. The motion on the quasi two-dimensional surface is considered diffusive in both directions: transverse as well as along the cylinder axis. It is shown that both Dresselhaus and Rashba SOC affect the spin relaxation rates. We detect a crossover from weak localization to weak anti-localization depending on SOC strength as well as dephasing and scattering rate.
[1] S. Kettemann, PRL 98 176808 (2007)
P. Wenk et al., PRB 83 115301 (2011)
S. Heedt et al., Nanoscale 7 18188 (2015)