Effective held theory of the zero-temperature triangular-lattice antiferromagnet: A Monte Carlo study

Citation
H. Yin et al., Effective held theory of the zero-temperature triangular-lattice antiferromagnet: A Monte Carlo study, PHYS REV E, 61(6), 2000, pp. 6426-6433
Citations number
21
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW E
ISSN journal
1063-651X → ACNP
Volume
61
Issue
6
Year of publication
2000
Part
A
Pages
6426 - 6433
Database
ISI
SICI code
1063-651X(200006)61:6<6426:EHTOTZ>2.0.ZU;2-Q
Abstract
Using a Monte Carlo coarse-graining technique introduced by Binder [Z. Phys . B 43, 119 (1981)], we have explicitly constructed the continuum field the ory for the zero-temperature triangular Ising antiferromagnet. We verify th e conjecture that this is a Gaussian theory of the height variable in the i nterface representation of the spin model. We also measure the height-heigh t correlation function and deduce the stiffness constant. In addition, we i nvestigate the nature of defect-defect interactions at finite temperatures, and find that the two-dimensional Coulomb gas scenario applies at low temp eratures.