Low density ferromagnetism in the Hubbard model
Condensed Matter
2009-10-28 v1
Abstract
A single-band Hubbard model with nearest and next-nearest neighbour hopping is studied for , 2, 3, using both analytical and numerical techniques. In one dimension, saturated ferromagnetism is found above a critical value of for a band structure with two minima and for small and intermediate densities. This is an extension of a scenario recently proposed by M\"uller--Hartmann. For three dimensions and non-pathological band structures, it is proven that such a scenario does not work.
Cite
@article{arxiv.cond-mat/9603163,
title = {Low density ferromagnetism in the Hubbard model},
author = {P. Pieri and S. Daul and D. Baeriswyl and M. Dzierzawa and P. Fazekas},
journal= {arXiv preprint arXiv:cond-mat/9603163},
year = {2009}
}
Comments
4 pages, 3 postscript figures