Coulomb blockade in a lateral triangular small quantum dot |
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Authors: | V. A. Tkachenko Z. D. Kvon O. A. Tkachenko D. G. Baksheev O. Estibals J. C. Portal |
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Affiliation: | (1) Institute of Semiconductor Physics, Siberian Division, Russian Academy of Sciences, Novosibirsk, 630090, Russia;(2) Grenoble High Magnetic Fields Laboratory, MPI-FKF and CNRS, B.P.166, F-38042 Grenoble, France |
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Abstract: | An AlGaAs/GaAs lateral quantum dot of triangular shape with a characteristic size L<100 nm (the smallest size for dots of this type) containing less than ten electrons was studied theoretically and experimentally. Single-electron oscillations of the conductance G of this dot were measured at G<e 2/h. When going from G?e 2/h to G≈0.5e 2/h, a decrease was found not only in the amplitude but also in the period of oscillations. A calculation of the electrostatics demonstrated that this effect is due to a change in the dot size produced by control voltages. |
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