Role of interactions in the far-infrared spectrum of a lateral quantum dot molecule

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

Research output: Contribution to journalArticleScientificpeer-review

18 Citations (Scopus)
139 Downloads (Pure)

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.
Original languageEnglish
Article number187401
Pages (from-to)1-4
JournalPhysical Review Letters
Volume91
Issue number18
DOIs
Publication statusPublished - 2003
MoE publication typeA1 Journal article-refereed

Keywords

  • exact diagonalization
  • far-infrared spectrum
  • quantum dots

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