Density functional theory of spin-polarized disordered quantum dots
Mesoscale and Nanoscale Physics
2009-10-31 v1
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 noniteracting electrons, with a narrower Gaussian distribution due to interactions. The tird moment of the total distribution is independent of interactions, and so is predicted to decrease by a factor of 0.405 upon application of a magnetic field which transforms from the Gaussian orthogonal to the Gaussian unitary ensemble.
Cite
@article{arxiv.cond-mat/0006474,
title = {Density functional theory of spin-polarized disordered quantum dots},
author = {K. Hirose and F. Zhou and N. Wingreen},
journal= {arXiv preprint arXiv:cond-mat/0006474},
year = {2009}
}
Comments
13 pages, 2 figures