Quantum Phase Transition in the SU(4) Spin-Orbital Model on the Triangular Lattice
Strongly Correlated Electrons
2007-05-23 v1 Statistical Mechanics
Abstract
Motivated by the absence of cooperative Jahn-Teller effect in LiNiO2 and BaVS3, two layered oxides with triangular planes, we study the SU(4) symmetric spin-orbital model on the triangular lattice. Upon reducing the next-nearest neighbour coupling, we show that the system undergoes a quantum phase transition to a liquid phase. A variational approach to this liquid phase shows that simple types of long-range correlations are suppressed, suggesting that it is stable against lattice distortions.
Cite
@article{arxiv.cond-mat/0212211,
title = {Quantum Phase Transition in the SU(4) Spin-Orbital Model on the Triangular Lattice},
author = {Karlo Penc and Matthieu Mambrini and Patrik Fazekas and Frederic Mila},
journal= {arXiv preprint arXiv:cond-mat/0212211},
year = {2007}
}
Comments
5 pages, 5 figures, RevTex4