Spin Ensemble Density Functional Theory for Inhomogeneous Quantum Hall Systems
arXiv:cond-mat/9701079 · doi:10.1103/PhysRevB.56.10373
Abstract
We have developed an ensemble density functional theory which includes spin degrees of freedom for nonuniform quantum Hall systems. We have applied this theory using a local-spin-density approximation to study the edge reconstruction of parabolically confined quantum dots. For a Zeeman splitting below a certain critical value, the edge of completely polarized maximum density droplet reconstructs into a spin-unpolarized structure. For larger Zeeman splittings, the edge remains polarized and develops an exchange hole.
16 pages RevTex, 8 encapsulated Postscript figures. Submitted to Phys. Rev. B