Single-electron charging and detection in a laterally coupled quantum-dot circuit in the few-electron regime
Authors:
- L.-X. ZhangLZL.-X. Zhang
- P. MatagnePMP. Matagne
- J. P. LeburtonJLJ. P. Leburton
- R. HansonRHR. Hanson
- L. P. KouwenhovenLKL. P. Kouwenhoven
- 3 June 2004
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 69 (24) , 245301
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 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
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