title: Spin and conductance-peak-spacing distributions in large quantum dots: a density-functional theory study.
abstract: We use spin-density-functional theory to study the spacing between conductance peaks and the ground-state spin of 2D model quantum dots with up to 200 electrons. Distributions for different ranges of electron number are obtained in both symmetric and asymmetric potentials. The even/odd effect is pronounced for small symmetric dots but vanishes for large asymmetric ones, suggesting substantially stronger interaction effects than expected. The fraction of high-spin ground states is remarkably large.
authors.affiliation: Department of Chemistry, Duke University, Durham, North Carolina 27708-0354, USA.
authors.forename: Hong
authors.initials: H
authors.lastname: Jiang
authors.forename: Harold U
authors.initials: HU
authors.lastname: Baranger
authors.forename: Weitao
authors.initials: W
authors.lastname: Yang