Excitonic ferromagnetism in the hexaborides
Strongly Correlated Electrons
2009-10-31 v1
Abstract
A ferromagnet with a small spontaneous moment but with a high Curie temperature can be obtained by doping an excitonic insulator made from a spin triplet exciton condensate. Such a condensate can occur in a semimetal with a small overlap or a semiconductor with a small bandgap. We propose that it is responsible for the unexpected ferromagnetism in the doped hexaboride material Ca_{1-x}La_xB_6.
Keywords
Cite
@article{arxiv.cond-mat/9904330,
title = {Excitonic ferromagnetism in the hexaborides},
author = {M. E. Zhitomirsky and T. M. Rice and V. I. Anisimov},
journal= {arXiv preprint arXiv:cond-mat/9904330},
year = {2009}
}
Comments
4 pages, 3 figures