Phase diagram and optical conductivity of the ionic Hubbard model

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dc.creatorBrune, P.
dc.creatorJaparidze, G. I.
dc.creatorKampf, A. P.
dc.creatorSekania, M.
dc.date2001-06-01
dc.date2002-07-11
dc.date.accessioned2026-07-07T02:41:37Z
dc.date.available2026-07-07T02:41:37Z
dc.descriptionWe investigate the ground state phase diagram of the one-dimensional ionic Hubbard model with an alternating potential at half-filling by the bosonization technique as well as by numerical diagonalization of finite systems with the Lanczos and DMRG methods. Our results support the existence of a single "metallic" transition point from a band to a correlated insulator with simultaneous charge and bond-charge order. In addition, we present results for the optical conductivity obtained by the dynamical DMRG method. The insulator-insulator phase transition scenario is discussed in detail including a critical review of existing approaches and results for the ionic Hubbard model.
dc.description13 pages, 10 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0106007
dc.identifierhttp://arxiv.org/abs/cond-mat/0106007
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/17816
dc.subjectStrongly Correlated Electrons
dc.titlePhase diagram and optical conductivity of the ionic Hubbard model
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