Absence of Hole Confinement in Transition Metal Oxides with Orbital Degeneracy

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dc.creatorDaghofer, M.
dc.creatorWohlfeld, K.
dc.creatorOles, A. M.
dc.creatorArrigoni, E.
dc.creatorHorsch, P.
dc.date2008-02-14
dc.date.accessioned2026-07-07T09:20:47Z
dc.date.available2026-07-07T09:20:47Z
dc.descriptionWe investigate the spectral properties of a hole moving in a two-dimensional Hubbard model for strongly correlated t_2g electrons. Although superexchange interactions are Ising-like, a quasi-one-dimensional coherent hole motion arises due to effective three-site terms. This mechanism is fundamentally different from the hole motion via quantum fluctuations in the conventional spin model with SU(2) symmetry. The orbital model describes also propagation of a hole in some e_g compounds, and we argue that orbital degeneracy alone does not lead to hole self-localization.
dc.description4 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/0802.2012
dc.identifierhttp://arxiv.org/abs/0802.2012
dc.identifierPhys. Rev. Lett. 100, 066403 (2008)
dc.identifierdoi:10.1103/PhysRevLett.100.066403
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/154829
dc.subjectStrongly Correlated Electrons
dc.titleAbsence of Hole Confinement in Transition Metal Oxides with Orbital Degeneracy
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