Monte Carlo study of the anisotropic Heisenberg antiferromagnet on the triangular lattice

W. Stephan and B. W. Southern
Phys. Rev. B 61, 11514 – Published 1 May 2000
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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.

  • Received 23 November 1999

DOI:https://doi.org/10.1103/PhysRevB.61.11514

©2000 American Physical Society

Authors & Affiliations

W. Stephan* and B. W. Southern

  • Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2

  • *Present address: Bishop’s University, Lennoxville, Québec, Canada J1M 1Z7.

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Vol. 61, Iss. 17 — 1 May 2000

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