Density-functional theory of spin-polarized disordered quantum dots

2000/06/29 by Kei Hirose, K. Hirose, Fei Zhou +3
Physics and Astronomy · #Advanced Chemical Physics Studies #Condensed matter physics #Coulomb #Density functional theory #Electron #Fermi energy #Gaussian #Ground state #Magnetic properties of thin films #Physics #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Spin (aerodynamics) #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.63.075301

13 pages, 2 figures

arxiv created 2000/06/29 · openalex publication_date 2001/01/16 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

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.

Citations

• Spin-density-functional theory of circular and elliptical quantum dots
• Statistics of conductance oscillations of a quantum dot in the Coulomb-blockade regime
• Iterative minimization techniques forab initiototal-energy calculations: molecular dynamics and conjugate gradients
• Self-Consistent Equations Including Exchange and Correlation Effects