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HL: Fachverband Halbleiterphysik

HL 39: Posters II (Topological insulators; Graphene; Spintronics and spin physics; Quantum information science)

HL 39.31: Poster

Dienstag, 17. März 2015, 14:00–20:00, Poster F

Spin noise spectroscopy of artificial atoms in isotopically enriched 28Si:P — •Michael Beck1, Helge Riemann2, Jens Hübner1, and Michael Oestreich11Institut für Festkörperphysik, Leibniz Universität Hannover, Appelstr.2, D-30167 Hannover — 2Leibniz-Institut für Kristallzüchtung, Max-Born-Str. 2, D-12489 Berlin

Spins of donor atoms in a silicon host are promising candidates for the implementation of quantum information devices [1]. The decoupling of donor atoms from the nuclear spin bath of the host lattice by means of isotopical enrichement leads to very long coherence times of donor electron spins [2]. Here, we will employ semiconductor spin noise spectroscopy [3] to investigate the spin dynamics of donor bound electrons in 28Si:P in the millikelvin temperature regime. The non-perturbative character of this method allows for the extraction of the intrinsic electron spin coherence time and is anticipated to reveal additional dephasing mechanisms at ultra low temperatures.
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A.M. Tyryshkin, S. Tojo, J.J.L Morton, H. Riemann, N.A. Abrosimov, P. Becker, HJ. Pohl, T. Schenkel, M.L.W Thewalt, K.M. Itoh, S.A. Lyon, Nature Matter. 11, 143, (2012).
J. Hübner, F. Berski, R. Dahbashi and M. Oestreich, physica status solidi (b) 251, 1824 (2014).

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