Stability of the shell structure in two-dimensional quantum dots
Research output: Contribution to journal › Article › Scientific › peer-review
|Number of pages||7|
|Journal||Physical Review B|
|Publication status||Published - Apr 2005|
|Publication type||A1 Journal article-refereed|
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.
- ELECTRONIC-STRUCTURE, KOHN-SHAM, ALGORITHM, EQUATIONS, ENERGY