Monte Carlo study of the anisotropic Heisenberg antiferromagnet on the triangular lattice
Abstract
We report a Monte Carlo study of the classical antiferromagnetic Heisenberg model with easy axis exchange anisotropy on the triangular lattice. Both the free energy cost for long-wavelength spin waves as well as for the formation of free vortices are obtained from the spin stiffness and vorticity modulus, respectively. Evidence for two distinct Kosterlitz-Thouless types of defect-mediated phase transitions at finite temperatures is presented.
- Publication:
-
Physical Review B
- Pub Date:
- May 2000
- DOI:
- 10.1103/PhysRevB.61.11514
- arXiv:
- arXiv:cond-mat/9911403
- Bibcode:
- 2000PhRvB..6111514S
- Keywords:
-
- 75.10.Hk;
- 75.40.Mg;
- Classical spin models;
- Numerical simulation studies;
- Condensed Matter - Statistical Mechanics
- E-Print:
- 8 pages, 10 figures