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Frustrated spin model as a hard-sphere liquid

Maxim Mostovoy·Nikolai Prokof'ev·Daniel Khomskii·Jasper Knoester
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Abstract

We show that one-dimensional topological objects (kinks) are natural degrees of freedom for an antiferromagnetic Ising model on a triangular lattice. Its ground states and the coexistence of spin ordering with an extensive zero-temperature entropy can be easily understood in terms of kinks forming a hard-sphere liquid. Using this picture we explain effects of quantum spin dynamics on that frustrated model, which we also study numerically.

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Maxim Mostovoy, Nikolai Prokof'ev, Daniel Khomskii, Jasper Knoester. 2002-10-31. Frustrated spin model as a hard-sphere liquid. https://doi.org/10.1103/physrevlett.90.147203

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