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arXiv · 1009.5348

Coulomb Blockade in an Open Quantum Dot

S. Amasha·I. G. Rau·M. Grobis·R. M. Potok·H. Shtrikman·D. Goldhaber-Gordon
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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 previously thought to be well described without invoking Coulomb interactions. At temperatures below 50 mK we observe a periodic oscillation in the conductance of the dot with gate voltage that corresponds 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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S. Amasha, I. G. Rau, M. Grobis, R. M. Potok, H. Shtrikman, D. Goldhaber-Gordon. 2010-09-27. Coulomb Blockade in an Open Quantum Dot. https://doi.org/10.1103/physrevlett.107.216804

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