Temperature and Magnetic Field Effects on the Transport Controlled Charge State of a Single Quantum Dot
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Nanoscale Research Letters 2010, 5:1150-1155 doi:10.1007/s11671-010-9618-xPublished: 5 May 2010
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.