Regensburg 2000 – scientific programme

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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.