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Tuning of tunneling rates in quantum dots using a quantum point contact

Rogge, M. C. ; Fricke, C. ; Harke, B. ; Hohls, F. ; Haug, R. J. ; Wegscheider, Werner
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Date of publication of this fulltext: 25 Jan 2010 13:15


We study the influence of asymmetric tunneling rates of a lateral quantum dot connected to source and drain leads. We use a quantum point contact (QPC) to detect charging events on the dot. Since the mean charge depends on the ratio of the tunneling rates the QPC can be used to detect symmetric configurations where both rates are equal. Thus, the transport properties of the dot can be ...


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