Role of Interactions in the Far-Infrared Spectrum of a Lateral Quantum-Dot Molecule

M. Marlo, A. Harju, and R. M. Nieminen
Phys. Rev. Lett. 91, 187401 – Published 31 October 2003

Abstract

We study the effects of electron-electron correlations and confinement potential on the far-infrared spectrum of a lateral two-electron quantum-dot molecule by exact diagonalization. The calculated spectra directly reflect the lowered symmetry of the external confinement potential. Surprisingly, we find interactions to drive the spectrum towards that of a high-symmetry parabolic quantum-dot. We conclude that far-infrared spectroscopy is suitable for probing effective confinement of the electrons in a quantum-dot system, even if interaction effects cannot be resolved in a direct fashion.

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  • Received 11 June 2003

DOI:https://doi.org/10.1103/PhysRevLett.91.187401

©2003 American Physical Society

Authors & Affiliations

M. Marlo, A. Harju, and R. M. Nieminen

  • Laboratory of Physics, Helsinki University of Technology, P.O. Box 1100 FIN-02015 HUT, Finland

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Issue

Vol. 91, Iss. 18 — 31 October 2003

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