| Numéro |
J. Phys. I France
Volume 4, Numéro 2, February 1994
|
|
|---|---|---|
| Page(s) | 181 - 186 | |
| DOI | https://doi.org/10.1051/jp1:1994131 | |
J. Phys. I France 4 (1994) 181-186
Short Communication
Critical behavior of the antiferromagnetic Heisenberg model on a stacked triangular lattice
T. Bhattacharya, A. Billoire, R. Lacaze and Th. JolicoeurService de Physique Théorique de Saclay, Laboratoire de la Direction des Sciences de la Matière du CEA, 91191 Gif sur Yvette Cedex, France
(Received 14 May 1993, received in final form 24 September 1993, accepted 2 December 1993)
Abstract
We estimate, using a large-scale Monte Carlo simulation, the critical
exponents of the antiferromagnetic Heisenberg model on a stacked triangular
lattice. We obtain the following estimates:
,
. These results contradict a perturbative
Renormalization Group calculation that points to Wilson-Fisher
O(4) behaviour. While these results may be coherent with
results
from Landau-Ginzburg analysis, they show the existence of an unexpectedly rich
structure of the Renormalization Group flow as a function of the
dimensionality and the number of components of the order parameter.
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