Mixed Heisenberg Chains. I. The Ground State Problem
Strongly Correlated Electrons
2009-10-30 v2 Statistical Mechanics
Abstract
We consider a mechanism for competing interactions in alternating Heisenberg spin chains due to the formation of local spin-singlet pairs. The competition of spin-1 and spin-0 states reveals hidden Ising symmetry of such alternating chains.
Cite
@article{arxiv.cond-mat/9703206,
title = {Mixed Heisenberg Chains. I. The Ground State Problem},
author = {H. Niggemann and G. Uimin and J. Zittartz},
journal= {arXiv preprint arXiv:cond-mat/9703206},
year = {2009}
}
Comments
7 pages, RevTeX, 4 embedded eps figures, final version