Density-functional theory of spin-polarized disordered quantum dots

Kenji Hirose, Fei Zhou, Ned S. Wingreen

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

Using density-functional theory, we investigate fluctuations of the ground-state energy of spin-polarized, disordered quantum dots in the metallic regime. To compare to experiment, we evaluate the distribution of addition energies and find a convolution of the Wigner-Dyson distribution, expected for noninteracting electrons, with a narrower Gaussian distribution. The width of the Gaussian is accurately given by the fluctuations in the screened Coulomb interaction between a pair of electrons at the Fermi energy.

Original languageEnglish (US)
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume63
Issue number7
DOIs
StatePublished - Jan 16 2001

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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