Dresden 2014 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 48: Transport
HL 48.2: Vortrag
Dienstag, 1. April 2014, 14:15–14:30, POT 006
Weak Localization and Antilocalization in Two-Dimensional Hole Gases — •Paul Wenk1, Tobias Dollinger1, Andreas Scholz1, Roland Winkler2, John Schliemann1, and Klaus Richter1 — 1Institut I - Theoretische Physik, Universität Regensburg, D-93040 Regensburg, Germany — 2Department of Physics, Northern Illinois University, IL 60115 DeKalb, USA
We investigate the appearance of persistent spin states in two-dimensional hole gases including both Rashba and Dresselhaus spin-orbit coupling. To this end, we extend previous models for III-V semiconductors by going beyond the axial approximation. Using an effective 2× 2 heavy-hole model, we find persistent and long persisting spin states by analyzing the crossover from weak localization to weak antilocalization. The findings are derived using both Landauer-Büttiker framework and diagrammatic perturbation theory by exact diagonalization of the Cooperon.
[1] T. Dollinger et al., arXiv:1304.7747 (2013)
[2] J. Schliemann et al., Phys. Rev. Lett. 90 146801
(2003)
[3] S. Kettemann, Phys. Rev. Lett. 98 176808 (2007)
[4] P. Wenk, S. Kettemann, Phys. Rev. B 81 125309 (2010)