Coulomb Charging Effects in an Open Quantum Dot

Дата и время публикации : 2000-03-02T10:00:26Z

Авторы публикации и институты :
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

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 12 pages, RevTeX, 15 eps figures included, submitted to Phys. Rev. B
Первичная категория: cond-mat.mes-hall

Все категории : cond-mat.mes-hall

Краткий обзор статьи: 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.

Category: Physics