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HL: Halbleiterphysik
HL 41: Symposium: Spin-dependent transport in semiconductors - towards a spin transistor
HL 41.4: Fachvortrag
Friday, March 31, 2000, 12:05–12:30, H15
Optics, spin transport, and spin injection in semiconductors — •Michael Oestreich1, Jens Hübner1, Daniel Hägele1, Peter Klar1, Wolfram Heimbrodt1, Wolfgang Rühle1, Nikolaus Nestle2, and Karl Eberl3 — 1Fachbereich Physik und Wissenschaftliches Zentrum für Materialwissenschaften der Philipps-Universität, Renthof 5, D-35032 Marburg — 2Universität Ulm, Sektion Kernresonanzspektroskopie, D-89069 Ulm — 3Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, D-70569 Stuttgart
During the last years, spin electronics has been one of the fastest growing fields in physics leading to new device ideas such as spin transistors, spin memory devices, spin opto-electronics, or even spin quantum computers. Most essential requirements of such semiconductor devices which rely on the electron spin orientation are spin injection, spin transport, and the electron and hole spin dynamics. We study these processes by optical means, demonstrate a most efficient spin injection using diluted magnetic semiconductors, show the conservation of the electron spin orientation during transport in high electric fields, discuss problems concerning spin dephasing, and prove the feasibility of spin opto-electronics.