Spontaneous plaquette formation in the SU(4) Spin-Orbital ladder
Strongly Correlated Electrons
2009-10-31 v1
Abstract
The low-energy properties of the SU(4) spin-orbital model on a two-leg ladder are studied by a variety of analytical and numerical techniques. Like in the case of SU(2) models, there is a singlet-multiplet gap in the spectrum, but the ground-state is two-fold degenerate. An interpretation in terms of SU(4)-singlet plaquettes is proposed. The implications for general two-dimensional lattices are outlined.
Keywords
Cite
@article{arxiv.cond-mat/0006485,
title = {Spontaneous plaquette formation in the SU(4) Spin-Orbital ladder},
author = {M. van den Bossche and P. Azaria and P. Lecheminant and F. Mila},
journal= {arXiv preprint arXiv:cond-mat/0006485},
year = {2009}
}
Comments
4 pages, 5 Postscript figures