Anisotropic frustrated Heisenberg model on the honeycomb lattice
Strongly Correlated Electrons
2012-09-12 v3 Statistical Mechanics
Abstract
We investigate the ground-state phase diagram of an anisotropic Heisenberg model on the honeycomb lattice with competing interactions. We use quantum Monte Carlo simulations, as well as linear spin-wave and Ising series expansions, to determine the phase boundaries of the ordered magnetic phases. We find a region without any classical order in the vicinity of a highly frustrated point. Higher-order correlation functions in this region give no signal for long-range valence-bond order. The low-energy spectrum is derived via exact diagonalization to check for topological order on small-size periodic lattices.
Keywords
Cite
@article{arxiv.1201.1505,
title = {Anisotropic frustrated Heisenberg model on the honeycomb lattice},
author = {A. Kalz and M. Arlego and D. Cabra and A. Honecker and G. Rossini},
journal= {arXiv preprint arXiv:1201.1505},
year = {2012}
}
Comments
10 pages, 9 figures, (supplemental material given as ancillary files)