Disorder Induced Phase Transition in a Random Quantum Antiferromagnet
Condensed Matter
2009-10-22 v1
Abstract
A two-dimensional Heisenberg model with random antiferromagnetic nearest-neighbor exchange is studied using quantum Monte Carlo techniques. As the strength of the randomness is increased, the system undergoes a transition from an antiferromagnetically ordered ground state to a gapless disordered state. The finite-size scaling of the staggered structure factor and susceptibility is consistent with a dynamic exponent .
Cite
@article{arxiv.cond-mat/9406025,
title = {Disorder Induced Phase Transition in a Random Quantum Antiferromagnet},
author = {Anders W. Sandvik and Marco Vekic},
journal= {arXiv preprint arXiv:cond-mat/9406025},
year = {2009}
}
Comments
Revtex 3.0, 10 pages + 5 postscript figures available upon request, UCSBTH-94-16