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Frustrated spin model as a hard-sphere liquid

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arxiv cond-mat/0210711 v1 pith:RDJTI53I submitted 2002-10-31 cond-mat.stat-mech cond-mat.mtrl-sci

Frustrated spin model as a hard-sphere liquid

classification cond-mat.stat-mech cond-mat.mtrl-sci
keywords modelspinfrustratedhard-spherekinksliquidantiferromagneticcoexistence
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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