Intrinsic exchange-correlation magnetic fields in exact current-density functional theory for degenerate systems
Mesoscale and Nanoscale Physics
2015-06-17 v1
Abstract
We calculate the exact Kohn-Sham (KS) scalar and vector potentials that reproduce, within current-density functional theory, the steady-state density and current density corresponding to an electron quasiparticle added to the ground state of a model quantum wire. Our results show that, even in the absence of an external magnetic field, a KS description of a steady-state system in general requires a non-zero exchange-correlation magnetic field that is purely mechanical in origin. The KS paramagnetic current density is not, in general, that of the interacting system in any gauge.
Cite
@article{arxiv.1310.5887,
title = {Intrinsic exchange-correlation magnetic fields in exact current-density functional theory for degenerate systems},
author = {J. D. Ramsden and R. W. Godby},
journal= {arXiv preprint arXiv:1310.5887},
year = {2015}
}
Comments
6 pages, 2 figures