Discrete-Symmetry Breaking and Novel Critical Phenomena in an Antiferromagnetic Planar (XY) Model in Two Dimensions
Abstract
Landau-Ginzburg-Wilson symmetry analyses and Monte Carlo calculations for the classical antiferromagnetic planar (XY) model on a triangular lattice reveal a wealth of interesting critical phenomena. From this simple model arise a zero-field transition to a state of long-range order, a new mechanism for spin disordering, and a critical point associated with a possible new universality class.
- Publication:
-
Physical Review Letters
- Pub Date:
- February 1984
- DOI:
- 10.1103/PhysRevLett.52.433
- Bibcode:
- 1984PhRvL..52..433L
- Keywords:
-
- 64.60.Cn;
- 05.70.Fh;
- 05.70.Jk;
- 75.10.Ak;
- Order-disorder transformations;
- statistical mechanics of model systems;
- Phase transitions: general studies;
- Critical point phenomena