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

Ryo Tamura, Shu Tanaka, Naoki Kawashima

Research output: Contribution to journalArticle

4 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

Fingerprint

Phase transitions
dissociation
vortices
Vortex flow
interactions
transition points
Ising model
broken symmetry
temperature
Temperature

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Second-order phase transition in the Heisenberg model on a triangular lattice with competing interactions. / Tamura, Ryo; Tanaka, Shu; Kawashima, Naoki.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 87, No. 21, 214401, 03.06.2013.

Research output: Contribution to journalArticle

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