Second-order phase transition in the Heisenberg model on a triangular lattice with competing interactions

Ryo Tamura, Shu Tanaka, Naoki Kawashima

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5 Citations (Scopus)

Abstract

We discover an example where the dissociation of the Z2 vortices occurs at the second-order phase transition point. We investigate the nature of phase transition in a classical Heisenberg model on a distorted triangular lattice with competing interactions. The order parameter space of the model is SO(3)×Z2. The dissociation of the Z2 vortices which comes from SO(3) and a second-order phase transition with Z2 symmetry breaking occur at the same temperature. We also find that the second-order phase transition belongs to the universality class of the two-dimensional Ising model.

Original languageEnglish
Article number214401
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume87
Issue number21
DOIs
Publication statusPublished - 2013 Jun 3
Externally publishedYes

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ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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