Spin Stiffness in the Hubbard model
Condensed Matter
2009-10-28 v1
Abstract
The spin stiffness of the repulsive Hubbard model that occurs in the hydrodynamic theory of antiferromagnetic spin waves is shown to be the same as the thermodynamically defined stiffness involved in twisting the order parameter. New expressions for are derived, which enable easier interpretation, and connections with superconducting weight and gauge invariance are discussed.
Keywords
Cite
@article{arxiv.cond-mat/9510144,
title = {Spin Stiffness in the Hubbard model},
author = {J. M. J. van Leeuwen and M. S. L. du Croo de Jongh and P. J. H. Denteneer},
journal= {arXiv preprint arXiv:cond-mat/9510144},
year = {2009}
}
Comments
21 Pages LaTeX2e, to be published in Journal of Physics A