Exact solution of a spin-ladder model
Strongly Correlated Electrons
2009-10-31 v1
Abstract
An integrable spin-ladder model with nearest-neighbor exchanges and biquadratic interactions is proposed. With the Bethe ansatz solutions of the model hamiltonian, it is found that there are three possible phases in the ground state, i.e., a rung-dimerized phase with a spin gap, and two massless phases. The possible fixed points of the system and the quantum critical behavior at the critical point are discussed.
Keywords
Cite
@article{arxiv.cond-mat/9901168,
title = {Exact solution of a spin-ladder model},
author = {Yupeng Wang},
journal= {arXiv preprint arXiv:cond-mat/9901168},
year = {2009}
}
Comments
6page Revtex, no figure