Berlin 2005 – scientific programme
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HL: Halbleiterphysik
HL 21: Spintronik III
HL 21.9: Talk
Saturday, March 5, 2005, 12:45–13:00, TU P164
Pulsed electrical spin injection into III-V semiconductor heterostructures — •Nicolas Müsgens1, Lars Schreiber1, Georg Richter1, Bernd Beschoten1, Gernot Güntherodt1, and Paul A. Crowell2 — 1II. Physikalisches Institut, RWTH Aachen, 52056 Aachen — 2School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
The implementation of coherent electron spins into semiconductors and the full control of their quatum mechanical degrees of freedom may eventually enable quantum computational operations in solid state devices. Spin coherence in semiconductors has so far only been established and monitored by time-resolved all optical pump probe techniques. Here, we use a novel time-resolved technique, which offers to electrically create and inject coherent spin states into a spin light-emitting diode using ultrafast current pulses (FWHM ∼ 100 ps). Both, transport and dephasing of the injected spin packets can be probed by phase-locked time-resolved Kerr rotation.
Supported by BMBF FKZ BM 160