Finite-temperature transition of the distorted kagome-lattice Heisenberg antiferromagnet

Details Finite-temperature transition of the distorted kagome-lattice Heisenberg antiferromagnet Finite-temperature transition of the distorted kagome-lattice Heisenberg antiferromagnet

2012-01-26

arxiv.org/abs/1201.5441v1

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

Motivated by the recent experiment on kagome-lattice antiferromagnets, we study the zero-field ordering behavior of the antiferromagnetic classical Heisenberg model on a uniaxially distorted kagome lattice by Monte Carlo simulations. It is found that a first-order transition, which has no counterpart in the corresponding undistorted model, takes place at a very low temperature. Origin of the transition is discussed in terms of topological excitations inherent to the model.

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