Finite-Temperature Transition of the Antiferromagnetic Heisenberg Mondel on a Distorted Kagome Lattice

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. A first-order transition, which has no counterpart in the corresponding undistorted model, takes place at a very low temperature. The origin of the transition is ascribed to a cooperative proliferation of topological excitations inherent to the model.

    

(by Tsuyoshi Okubo)

Reference

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