Theory of the field-induced BEC in the frustrated spin-1/2 dimer compound BaCuSi2O6

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dc.creatorLaflorencie, Nicolas
dc.creatorMila, Frederic
dc.date2008-11-28
dc.date2009-02-16
dc.date.accessioned2026-07-07T12:41:30Z
dc.date.available2026-07-07T12:41:30Z
dc.descriptionBuilding on recent neutron and NMR experiments, we investigate the field-induced exotic criticality observed in the frustrated spin-1/2 dimer compound BaCuSi2O6 using a frustrated model with two types of bilayers. A semiclassical treatment of the effective hard-core boson model shows that perfect inter-layer frustration leads to a 2D-like critical exponent phi=1 without logarithmic corrections and to a 3D low temperature phase with different but non vanishing triplet populations in both types of bilayers. These results further suggest a simple phenomenology in terms of a field-dependent transverse coupling in the context of which we reproduce the entire field-temperature phase diagram with Quantum Monte Carlo simulations.
dc.identifierhttps://arxiv.org/abs/0811.4745
dc.identifierhttp://arxiv.org/abs/0811.4745
dc.identifierPhys. Rev. Lett. 102, 060602 (2009)
dc.identifierdoi:10.1103/PhysRevLett.102.060602
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/219791
dc.subjectStrongly Correlated Electrons
dc.titleTheory of the field-induced BEC in the frustrated spin-1/2 dimer compound BaCuSi2O6
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