Single-electron charging and detection in a laterally-coupled quantum dot circuit in the few-electron regime

L. -X. Zhang; P. Matagne; J. P. Leburton; R. Hanson; L. P. Kouwenhoven

doi:10.1103/PhysRevB.69.245301

Single-electron charging and detection in a laterally-coupled quantum dot circuit in the few-electron regime

Mesoscale and Nanoscale Physics 2009-11-10 v1

Authors: L. -X. Zhang , P. Matagne , J. P. Leburton , R. Hanson , L. P. Kouwenhoven

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Abstract

We provide a physical analysis of the charging and detection of the first few electrons in a laterally-coupled GaAs/AlGaAs quantum dot (LCQD) circuit with integrated quantum point contact (QPC) read-out. Our analysis is based on the numerical solution of the Kohn-Sham equation incorporated into a three-dimensional self-consistent scheme for simulating the quantum device. Electronic states and eigenenergy spectra reflecting the particular LCQD confinement shape are obtained as a function of external gate voltages. We also derive the stability diagram for the first few electrons in the device, and obtain excellent agreement with experimental data.

Keywords

quantum dot charging detection Kohn-Sham equation stability diagram

Cite

@article{arxiv.cond-mat/0311044,
  title  = {Single-electron charging and detection in a laterally-coupled quantum dot circuit in the few-electron regime},
  author = {L. -X. Zhang and P. Matagne and J. P. Leburton and R. Hanson and L. P. Kouwenhoven},
  journal= {arXiv preprint arXiv:cond-mat/0311044},
  year   = {2009}
}

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8 figures, submitted to Physical Review B

Single-electron charging and detection in a laterally-coupled quantum dot circuit in the few-electron regime

Abstract

Keywords

Cite

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