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arXiv · 1808.05574

Hole-capture competition between a single quantum dot and an ionized acceptor

Julia Wiegand·Dmitry S. Smirnov·Jakob Osberghaus·Lida Abaspour·Jens Hübner·Michael Oestreich
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Abstract

We study the competition of hole capture between an In(Ga)As quantum dot and a directly adjacent ionized impurity in view of spin-photon interfaces. The Kerr rotation noise spectroscopy at 4.2 K shows that the hole-capture probability of the In(Ga)As quantum dot is about one order of magnitude higher compared to the hole-capture probability of the ionized impurity and suggests that a simultaneous occupation of quantum dot and impurity by a hole is efficiently suppressed due to Coulomb interaction. A theoretical model of interconnected spin and charge noise allows the quantitative specification of all relevant time scales.

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Julia Wiegand, Dmitry S. Smirnov, Jakob Osberghaus, Lida Abaspour, Jens Hübner, Michael Oestreich. 2018-08-16. Hole-capture competition between a single quantum dot and an ionized acceptor. https://doi.org/10.1103/physrevb.98.125426

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