Abstract:
An AlGaAs/GaAs lateral quantum dot of triangular shape with a characteristic size L<100nm (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<e2/h. When going from G≪e2/h to G≈0.5e2/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.
Citation:
V. A. Tkachenko, Z. D. Kvon, O. A. Tkachenko, D. G. Baksheev, O. Estibals, J. C. Portal, “Coulomb blockade in a lateral triangular small quantum dot”, Pis'ma v Zh. Èksper. Teoret. Fiz., 76:12 (2002), 850–854; JETP Letters, 76:12 (2002), 720–723
O A Tkachenko, V A Tkachenko, Z D Kvon, A L Aseev, J-C Portal, Nanotechnology, 23:9 (2012), 095202
JETP Letters, 90:8 (2009), 582–586
V. A. Tkachenko, O. A. Tkachenko, Z. D. Kvon, D. G. Baksheev, A. L. Aseev, J. C. Portal, JETP Letters, 80:9 (2004), 588–592
O. A. Tkachenko, V. A. Tkachenko, D. G. Baksheev, JETP Letters, 79:6 (2004), 293–297
D. G. BAKSHEYEV, A. A. BYKOV, V. A. TKACHENKO, O. A. TKACHENKO, L. V. LITVIN, A. V. LATYSHEV, A. L. ASEEV, O. ESTIBALS, J.-C. PORTAL, Int. J. Nanosci., 02:06 (2003), 495