Quantum Monte Carlo simulations of the half-filled two-dimensional Kondo lattice model
Strongly Correlated Electrons
2009-10-31 v1
Abstract
The 2D half-filled Kondo lattice model with exchange J and nearest neighbor hopping t is considered. It is shown that this model belongs to a class of Hamiltonians for which zero-temperature auxiliary field Monte Carlo methods may be efficiently applied. We compute the staggered moment, spin and quasiparticle gaps on lattice sizes up to 12 X 12. The competition between the RKKY interaction and Kondo effect leads to a continuous quantum phase transition between antiferromagnetic and spin-gaped insulators. This transition occurs at J/t = 1.45 \pm 0.05.
Cite
@article{arxiv.cond-mat/9904178,
title = {Quantum Monte Carlo simulations of the half-filled two-dimensional Kondo lattice model},
author = {F. F. Assaad},
journal= {arXiv preprint arXiv:cond-mat/9904178},
year = {2009}
}
Comments
4 pages including 6 figures in eps format