First-order phase transition in easy-plane quantum antiferromagnets

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dc.creatorKragset, S.
dc.creatorSmorgrav, E.
dc.creatorHove, J.
dc.creatorNogueira, F. S.
dc.creatorSudbo, A.
dc.date2006-09-14
dc.date2006-12-12
dc.date.accessioned2026-07-07T07:23:33Z
dc.date.available2026-07-07T07:23:33Z
dc.descriptionQuantum phase transitions in Mott insulators do not fit easily into the Landau-Ginzburg-Wilson paradigm. A recently proposed alternative to it is the so called deconfined quantum criticality scenario, providing a new paradigm for quantum phase transitions. In this context it has recently been proposed that a second-order phase transition would occur in a two-dimensional spin 1/2 quantum antiferromagnet in the deep easy-plane limit. A check of this conjecture is important for understanding the phase structure of Mott insulators. To this end we have performed large-scale Monte Carlo simulations on an effective gauge theory for this system, including a Berry phase term that projects out the $S=1/2$ sector. The result is a first-order phase transition, thus contradicting the conjecture.
dc.description4 pages, 4 figures. Stylistic changes, references added
dc.identifierhttps://arxiv.org/abs/cond-mat/0609336
dc.identifierhttp://arxiv.org/abs/cond-mat/0609336
dc.identifierPhys Rev Lett, 97, 247201 (2006)
dc.identifierdoi:10.1103/PhysRevLett.97.247201
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/116020
dc.subjectStrongly Correlated Electrons
dc.subjectHigh Energy Physics - Lattice
dc.titleFirst-order phase transition in easy-plane quantum antiferromagnets
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