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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 Oestreich¹ — ¹Institut 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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