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Ordering of the Antiferromagnetic Heisenberg Model on a Pyrochlore Slab

Takuya Arimori·Hikaru Kawamura
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Abstract

Ordering of the geometrically frustrated two-dimensional Heisenberg antiferromagnet on a pyrochlore slab is studied by Monte Carlo simulations. The model is expected to serve as a reference system of SrCrGaO compound studied extensively. In sharp contrast to the kagomé Heisenberg antiferromagnet, the model exhibits locally non-coplanar spin structures at low temperatures, bearing nontrivial chiral degrees of freedom. We find that under certain conditions the model exhibits a novel Kosterlitz-Thouless-type transition at a finite temperature associated with these chiral degrees of freedom. Implications to experiments are discussed.

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Takuya Arimori, Hikaru Kawamura. 2002-01-10. Ordering of the Antiferromagnetic Heisenberg Model on a Pyrochlore Slab. https://doi.org/10.1143/jpsj.70.3695

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