Scaling in the Fan of an Unconventional Quantum Critical Point
Strongly Correlated Electrons
2008-01-09 v2
Abstract
We present results of extensive finite-temperature Quantum Monte Carlo simulations on a SU(2) symmetric S=1/2 quantum antiferromagnet with a four-spin interaction [Sandvik, Phys. Rev. Lett. 98, 227202 (2007)]. Our simulations, which are free of the sign-problem and carried out on lattices containing in excess of 1.6 X 10^4 spins, indicate that the four-spin interaction destroys the N\'eel order at an unconventional z=1 quantum critical point, producing a valence-bond solid paramagnet. Our results are consistent with the `deconfined quantum criticality' scenario.
Keywords
Cite
@article{arxiv.0707.2961,
title = {Scaling in the Fan of an Unconventional Quantum Critical Point},
author = {Roger G. Melko and Ribhu K. Kaul},
journal= {arXiv preprint arXiv:0707.2961},
year = {2008}
}
Comments
published version, minor changes