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Stability of the shell structure in two-dimensional quantum dots

Research output: Contribution to journalArticleScientificpeer-review

Details

Original languageEnglish
Article number165302
Number of pages7
JournalPhysical Review B
Volume71
Issue number16
DOIs
Publication statusPublished - Apr 2005
Externally publishedYes
Publication typeA1 Journal article-refereed

Abstract

We study the effects of external impurities on the shell structure in semiconductor quantum dots by using a fast response-function method for solving the Kohn-Sham equations. We perform statistics of the addition energies up to 20 interacting electrons. The results show that the shell structure is generally preserved even if there are clear signs of disorder in the energetics. The Coulomb interaction and the variation in ground-state spins have a strong effect on the addition-energy distributions, which in the noninteracting single-electron picture correspond to level statistics showing mixtures of Poisson and Wigner forms.

Keywords

  • ELECTRONIC-STRUCTURE, KOHN-SHAM, ALGORITHM, EQUATIONS, ENERGY