Dresden 2011 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 44: Poster Session I
HL 44.18: Poster
Dienstag, 15. März 2011, 18:00–21:00, P3
Spin Noise Spectroscopy and Selection Rules in Highly Purified 28Silicon — •Nils Scharnhorst1, Georg Müller1, Helge Riemann2, Jens Hübner1, and Michael Oestreich1 — 1Institute for Solid State Physics, Leibniz Universität Hannover, Appelstr. 2, D-30167 Hannover, Germany — 2Institut für Kristallzüchtung, Max-Born-Str. 2, D-12489 Berlin, Germany
We present our most recent experimental setup and results in qualifying the spin-lifetime and spin-selection rules of donor-bound and free electrons in highly purified 28Silicon and natural silicon. Isotopically pure 28Silicon is promising very long spin-coherence times due the missing inhomogeneous spin decoherence via nuclear hyperfine-interaction. The fragile measurements on localized spins in 28Silicon will be realized by spin-noise spectroscopy based upon weakly interaction off-resonant Faraday-rotation [1] while spin selective pump-probe measurements yield the spin selection rules at the Δ-band minimum in natural, slightly n-doped silicon.
[1] G. M. Müller, M. Oestreich, M. Römer, and J. Hübner, Semiconductor spin noise spectroscopy: Fundamentals, accomplishments, and challenges, Physica E 43, 569 (2010).