Spin-density-functional theory of circular and elliptical quantum dots

Kenji Hirose, Ned S. Wingreen

Research output: Contribution to journalArticlepeer-review

170 Scopus citations

Abstract

Using spin-density-functional theory, we study the electronic states of a two-dimensional parabolic quantum dot with up to (Formula presented) electrons. We observe a shell structure for the filling of the dot with electrons. Hund’s rule determines the spin configuration of the ground state, but only up to 22 electrons. At specific N, the ground state is degenerate, and a small elliptical deformation of the external potential induces a rotational charge-density-wave state. Previously identified spin-density-wave states are shown to be artifacts of broken spin symmetry in density-functional theory.

Original languageEnglish (US)
Pages (from-to)4604-4607
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume59
Issue number7
DOIs
StatePublished - 1999

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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