Phase Transition of the Two-Dimensional Heisenberg Antiferromagnet on the Triangular Lattice
1984 年 53 巻 1 号 p. 9-12
詳細
1984 年 53 巻 1 号 p. 9-12
Ordering process of the antiferromagnetic Heisenberg model on the triangular lattice is studied. It is strongly suggested that there exists a phase transition both by a topological analysis of defects and by a Monte Carlo simulation. The phase transition is attributed to the pair dissociation of a kind of vortices which correspond to the topological point defect, Π1(SO(3))=Z2.
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