Coulomb blockade in an open quantum dot |
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Authors: | Amasha S Rau I G Grobis M Potok R M Shtrikman H Goldhaber-Gordon D |
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Institution: | Department of Physics, Stanford University, California 94305, USA. samasha@stanford.edu |
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Abstract: | We report the observation of Coulomb blockade in a quantum dot contacted by two quantum point contacts each with a single fully transmitting mode, a system thought to be well described without invoking Coulomb interactions. Below 50 mK we observe a periodic oscillation in the conductance of the dot with gate voltage, corresponding to a residual quantization of charge. From the temperature and magnetic field dependence, we infer the oscillations are mesoscopic Coulomb blockade, a type of Coulomb blockade caused by electron interference in an otherwise open system. |
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