S. Amasha, I. G. Rau, M. Grobis, R. M. Potok, H. Shtrikman, D. Goldhaber-Gordon
Published 2010-09-27Version 1
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.
Comments: Text and supplementary information. Text: 4 pages, 4 figures. Supplementary information: 4 pages, 4 figures
Journal: Phys. Rev. Lett. 107 216804 (2011)
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