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HL: Fachverband Halbleiterphysik

HL 75: Transport: Spintronics and magnetotransport 1 (TT, jointly with HL, MA)

HL 75.2: Vortrag

Donnerstag, 14. März 2013, 09:45–10:00, H18

Persistent Spin Helix Conditions in Two-Dimensional Electron and Hole Gases — •Tobias Dollinger, Andreas Scholz, Paul Wenk, John Schliemann, and Klaus Richter — Institut für Theoretische Physik, Universität Regensburg

We discuss magnetotransport in systems with nonnegligable cubic in momentum Dresselhaus Spin Orbit Interaction (SOI). The latter has been found responsible for diminishing and shifting the parameter regime where weak localization signatures, attributed to the so called "Persistent Spin Helix"(PSH) symmetry [1,2], are detected in magnetoconductance traces [3]. Building on the electronic results, we present an effective model for the heavy hole band of a confined twodimensional hole gas, where typically SOI terms with cubic structure are relevant. We investigate numerically and analytically the magnetotransport propery of this model, in which we can identify an analogue to the PSH.
[1]J. Schliemann et al., PRL 90 146801 (2003)
Bernevig et al., PRL 97 236601 (2006)
Kohda et al., PRB 86 081306 (2012)