Ferromagnetism in Hubbard Models
Statistical Mechanics
2009-10-28 v2
Abstract
We present the first rigorous examples of non-singular Hubbard models which exhibit ferromagnetism at zero temperature. The models are defined in arbitrary dimensions, and are characterized by finite-ranged hoppings, dispersive bands, and finite on-site Coulomb interaction U. The picture, which goes back to Heisenberg, that sufficiently large Coulomb interaction can revert Pauli paramagnetism into ferromagnetism has finally been confirmed in concrete examples.
Cite
@article{arxiv.cond-mat/9509063,
title = {Ferromagnetism in Hubbard Models},
author = {Hal Tasaki},
journal= {arXiv preprint arXiv:cond-mat/9509063},
year = {2009}
}
Comments
LaTeX, 8 pages with two epsf figures. A short note is added in August 1997