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Please use this identifier to cite or link to this item: http://hdl.handle.net/1993/2926

Title: Is there a phase transition in the isotropic Heisenberg anti-ferromagnet on the triangular lattice?
Authors: Stephan, W
Southern, BW
Keywords: MONTE-CARLO
QUANTUM ANTIFERROMAGNETS
SPIN STIFFNESS
SYSTEMS
MODEL
Issue Date: 31-Dec-2001
Citation: 0008-4204; CAN J PHYS, NOV-DEC 2001, vol. 79, no. 39398, p.1459 to 1461.
Abstract: The phase diagram of the classical anisotropic (XXZ) Heisenberg model on the two-dimensional triangular lattice is investigated using Monte Carlo methods. In the easy-axis limit, two finite-temperature vortex-unbinding transitions have been observed. In the easy-plane limit, there also appear to be two distinct finite-temperature phase transitions that are very close in temperature. The upper transition corresponds to an Ising-like chirality ordering and the lower temperature transition corresponds to a Kosterlitz-Thouless vortex-unbinding transition. These phase-transition lines all meet at the Heisenberg point and provide strong evidence that the isotropic model undergoes a novel finite-temperature phase transition.
URI: http://hdl.handle.net/1993/2926
DOI: http://dx.doi.org/10.1139/p01-086
Appears in Collection(s):Research Publications (UofM Student, Faculty and Staff only access)

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