Itineracy Effects on Spin Correlations in 1D Mott Insulators
Strongly Correlated Electrons
2009-11-10 v1
Abstract
We consider spin correlations in the one dimensional half filled repulsive Hubbard model. For very large values of the on-site repulsion U the spin correlations are dominated by virtual hopping processes of electrons and are described in terms of a spin-1/2 Heisenberg chain. As U is decreased real hopping processes of electrons become important and eventually dominate the spin response. We discuss the evolution of the dynamical structure factor as a function of U. We comment on the relevance of our results for inelastic neutron scattering experiments on quasi-1D materials.
Cite
@article{arxiv.cond-mat/0312055,
title = {Itineracy Effects on Spin Correlations in 1D Mott Insulators},
author = {M. J. Bhaseen and F. H. L. Essler and A. Grage},
journal= {arXiv preprint arXiv:cond-mat/0312055},
year = {2009}
}
Comments
4 pages, RevTeX, 4 figures