O. A. Tkachenko, V. A. Tkachenko, D. G. Baksheyev, C. -T. Liang, M. Y. Simmons, C. G. Smith, D. A. Ritchie, Gil-Ho Kim, M. Pepper
Published 2000-03-02Version 1
Low-temperature transport properties of a lateral quantum dot formed by overlaying finger gates in a clean one-dimensional channel are investigated. Continuous and periodic oscillations superimposed upon ballistic conductance steps are observed, when the conductance G of the dot changes within a wide range 0<G<6e^2/h. Calculations of the electrostatics confirm that the measured periodic conductance oscillations correspond to successive change of the total charge of the dot by $e$. By modelling the transport it is shown that the progression of the Coulomb oscillations into the region G>2e^2/h may be due to suppression of inter-1D-subband scattering. Fully transmitted subbands contribute to coherent background of conductance, while sequential tunneling via weakly transmitted subbands leads to Coulomb charging of the dot.
Comments: 12 pages, RevTeX, 15 eps figures included, submitted to Phys. Rev. B
Spin-dependent transport in a clean one-dimensional channel
Non-local detection of resistance fluctuations of an open quantum dot
Entanglement generation through an open quantum dot: an exact approach
