Regensburg 2013 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 29: Poster Session: Spintronics; Spin-controled transport; Topological insulators; Interfaces / Surfaces; Magnetic semiconductors
HL 29.7: Poster
Montag, 11. März 2013, 16:00–20:00, Poster A
Magnetometry on spin-orbit effects in InGaAs/InP quantum wells — •Ayman Ibrahim1, Florian Herzog1, Benedikt Rupprecht1, Marc Wilde1, Thomas Schäpers2, Hilde Hartdegen2, Sebastian Heedt2, Christian Heyn3, and Dirk Grundler1 — 1Physik.-Dep. E10, TU München, D-85748 Garching — 2Peter Grünberg Institute (PGI-9), FZ Jülich, D-52425 Jülich — 3Institute of Applied Physics, University of Hamburg, D-20355 Hamburg
Spin-orbit coupling provokes beating patterns in both magnetic field dependent resistance (MR) and magnetization (MAG) measurements performed on a two-dimensional electron system (2DES) at low temperature. Recently, we have found an unexpected frequency shift and phase anomaly in the quantum oscillations when comparing separately conducted MR and MAG experiments. To understand the anomaly in detail, we aim at performing both experiments simultaneously on one-and-the-same 2DES. For this, we prepare a micromechanical torque magnetometer with integrated electrical contacts and mount the 2DES using a conductive bonding technique. We report our latest results. Financial support by the DFG via GR1640/3 in SPP 1285 "Semiconductor Spintronics" and NIM is gratefully acknowledged.