Dimer phases in quantum antiferromagnets with orbital degeneracy

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dc.creatorJackeli, G.
dc.creatorIvanov, D. A.
dc.date2007-05-21
dc.date2007-10-25
dc.date.accessioned2026-07-07T08:38:14Z
dc.date.available2026-07-07T08:38:14Z
dc.descriptionWe study and solve the ground-state problem of a microscopic model for a family of orbitally degenerate quantum magnets. The orbital degrees of freedom are assumed to have directional character and are represented by static Potts-like variables. In the limit of vanishing Hund's coupling, the ground-state manifold of such a model is spanned by the hard-core dimer (spin singlet) coverings of the lattice. The extensive degeneracy of dimer coverings is lifted at a finite Hund's coupling through an order-out-of-disorder mechanism by virtual triplet excitations. The relevance of our results to several experimentally studied systems is discussed.
dc.descriptionFinal version, minor changes
dc.identifierhttps://arxiv.org/abs/0705.2990
dc.identifierhttp://arxiv.org/abs/0705.2990
dc.identifierPhys. Rev. B 76, 132407 (2007)
dc.identifierdoi:10.1103/PhysRevB.76.132407
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/140656
dc.subjectStrongly Correlated Electrons
dc.subjectStatistical Mechanics
dc.titleDimer phases in quantum antiferromagnets with orbital degeneracy
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