Plaquette valence bond solid in the frustrated Heisenberg quantum antiferromagnet on the square lattice

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dc.creatorMambrini, M.
dc.creatorLaeuchli, A.
dc.creatorPoilblanc, D.
dc.creatorMila, F.
dc.date2006-06-29
dc.date2006-09-06
dc.date.accessioned2026-07-07T07:12:57Z
dc.date.available2026-07-07T07:12:57Z
dc.descriptionUsing both exact diagonalizations and diagonalizations in a subset of short-range valence bond singlets, we address the nature of the groundstate of the Heisenberg spin-1/2 antiferromagnet on the square lattice with competing next-nearest and next-next-nearest neighbor antiferromagnetic couplings (J1-J2-J3 model). A detailed comparison of the two approaches reveals a region along the line (J2+J3)/J1=1/2, where the description in terms of nearest-neighbor singlet coverings is excellent, therefore providing evidence for a magnetically disordered region. Furthermore a careful analysis of dimer-dimer correlation functions, dimer structure factors and plaquette-plaquette correlation functions provides striking evidence for the presence of a plaquette valence bond solid order in part of the magnetically disordered region.
dc.description11 pages, 17 figures To appear in Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/cond-mat/0606776
dc.identifierhttp://arxiv.org/abs/cond-mat/0606776
dc.identifierPhys. Rev. B 74, 144422 (2006)
dc.identifierdoi:10.1103/PhysRevB.74.144422
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/112265
dc.subjectStrongly Correlated Electrons
dc.titlePlaquette valence bond solid in the frustrated Heisenberg quantum antiferromagnet on the square lattice
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