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Temperature and Magnetic Field Effects on the Transport Controlled Charge State of a Single Quantum Dot

Author(s): Larsson LA | Larsson M | Moskalenko ES | Holtz PO

Journal: Nanoscale Research Letters
ISSN 1931-7573

Volume: 5;
Issue: 7;
Start page: 1150;
Date: 2010;
Original page

Keywords: Quantum dot | Wetting layer | Magnetic field | Temperature dependence | Charge state

Abstract Individual InAs/GaAs quantum dots are studied by micro-photoluminescence. By varying the strength of an applied external magnetic field and/or the temperature, it is demonstrated that the charge state of a single quantum dot can be tuned. This tuning effect is shown to be related to the in-plane electron and hole transport, prior to capture into the quantum dot, since the photo-excited carriers are primarily generated in the barrier.
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