Dresden 2017 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 10: Spintronics II (joint session DS, HL, MA, TT, organized by HL)
TT 10.6: Talk
Monday, March 20, 2017, 16:30–16:45, POT 151
Off-diagonal g-tensor components in [113]-grown two-dimensional hole systems — •Christian Gradl1, Michael Kempf1, Johannes Holler1, Roland Winkler2, Dieter Schuh1, Dominique Bougeard1, Christian Schüller1, and Tobias Korn1 — 1Universität Regensburg, 93040 Regensburg, Germany — 2Department of Physics, Northern Illinois University, DeKalb, Illinois 60115, USA
Due to its p-like character, the valence band in GaAs-based heterostructures offers rich and complex spin-dependent phenomena. Especially for some low-symmetry growth directions, off-diagonal components of the hole g-tensor are theoretically predicted. Therefore, we perform time-resolved Kerr rotation measurements on an undoped [113]-grown double quantum well (QW) structure to resolve the spin dynamics of hole ensembles at low temperatures. By varying the direction of the applied magnetic field, we observe a non-diagonal hole g-tensor and quantify the individual tensor components, which are in very good agreement with our theoretical calculations.