Plaquette bond order wave in the quarter-filled extended Hubbard model on the checkerboard lattice

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dc.creatorIndergand, Martin
dc.creatorHonerkamp, Carsten
dc.creatorLaeuchli, Andreas
dc.creatorPoilblanc, Didier
dc.creatorSigrist, Manfred
dc.date2006-09-06
dc.date2007-01-22
dc.date.accessioned2026-07-07T07:41:52Z
dc.date.available2026-07-07T07:41:52Z
dc.descriptionAn extended Hubbard model (including nearest-neighbor repulsion and antiferromagnetic spin exchange) is investigated on the frustrated checkerboard lattice, a two-dimensional analog of the pyrochlore lattice. Combining Gutzwiller renormalized mean-field (MF) calculations, exact diagonalization (ED) techniques, and a weak-coupling renormalization group (RG) analysis we provide strong evidence for a crystalline valence bond plaquette phase at quarter-filling. The ground state is twofold degenerate and breaks translation symmetry. The bond energies show a staggering while the charge distribution remains uniform.
dc.description8 pages, 6 figures, published version
dc.identifierhttps://arxiv.org/abs/cond-mat/0609129
dc.identifierhttp://arxiv.org/abs/cond-mat/0609129
dc.identifierPhys. Rev. B 75, 045105 (2007)
dc.identifierdoi:10.1103/PhysRevB.75.045105
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/122274
dc.subjectStrongly Correlated Electrons
dc.titlePlaquette bond order wave in the quarter-filled extended Hubbard model on the checkerboard lattice
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