Stability of the shell structure in 2D quantum dots

Details Stability of the shell structure in 2D quantum dots Stability of the shell structure in 2D quantum dots

2004-12-03

arxiv.org/abs/cond-mat/0412070v1

Phys. Rev. B 71, 165302 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 8 figures, submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.71.165302

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 effects of high disorder are clear. 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.

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