Current Density Functional Theory and Orbital Magnetism

摘要: The basic motivations and ideas underlying the formulation of current spin density functional theory for electronic systems in a magnetic field are reviewed. We emphasize advantages using canonical as variable, fundamental constraints imposed by gauge symmetry on structure exchange-correlation energy functional, role played this enforcing conservation laws particle density. Next, we focus local approximation to exact theory. A generalized Thomas-Fermi is derived. Using theory, universal relation between distributions systems, valid limit large field, obtained. usefulness demonstrated some exactly solvable examples electrons parabolic confining potentials. Finally, present selection results from recent applications current-density theory: surface an electron-hole droplet, harmonically confined ground-state two-dimensional Wigner crystal.