Optimum ground states for spin-3/2 ladders with two legs
Statistical Mechanics
2009-10-31 v2 Strongly Correlated Electrons
Abstract
We construct the exact ground state for an antiferromagnetic spin-3/2 model on the two-leg ladder as an optimum ground state. The ground state contains a discrete parameter "sigma"=+/-1 and a continuous parameter "a" which controls z-axis anisotropy. For most values of "a" the global ground state is unique. It has vanishing sublattice magnetization and exponentially decaying correlation functions. By using the transfer matrix technique, we calculate exactly the fluctuations of the magnetization, the nearest-neighbour correlation, and the longitudinal correlation length as functions of the parameters.
Cite
@article{arxiv.cond-mat/9808342,
title = {Optimum ground states for spin-3/2 ladders with two legs},
author = {H. Niggemann and J. Zittartz},
journal= {arXiv preprint arXiv:cond-mat/9808342},
year = {2009}
}
Comments
LaTeX 2e, 3 embedded eps figures, 11 pages, minor modifications