Semiclassical theory for quantum spin models with ring exchange on the triangular lattice

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dc.creatorMadhav, Amulya V
dc.date2003-08-26
dc.date.accessioned2026-07-07T02:53:07Z
dc.date.available2026-07-07T02:53:07Z
dc.descriptionA semiclassical theory of a quantum spin$-S$ model with competing ring and Heisenberg exchange terms on the triangular lattice is obtained. A mechanism for the generation of $Z_2$ vortices is exhibited. The vortices are shown to carry a nontrivial geometric phase for the order parameter when $2S$ is odd, leading to a difference between the quantum disordered ground states and low energy spectra for half odd integer and half even integer spin systems, and a topological degeneracy on surfaces with nontrivial cycles. A connection to dimer models is discussed.
dc.description4 pages, Revtex
dc.identifierhttps://arxiv.org/abs/cond-mat/0308523
dc.identifierhttp://arxiv.org/abs/cond-mat/0308523
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/22088
dc.subjectStrongly Correlated Electrons
dc.titleSemiclassical theory for quantum spin models with ring exchange on the triangular lattice
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