Competing Ferromagnetic and Charge-Ordered States in Models for Manganites: the Origin of the CMR Effect

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dc.creatorSen, Cengiz
dc.creatorAlvarez, Gonzalo
dc.creatorDagotto, Elbio
dc.date2007-02-19
dc.date.accessioned2026-07-07T07:52:59Z
dc.date.available2026-07-07T07:52:59Z
dc.descriptionThe one-orbital model for manganites with cooperative phonons and superexchange coupling $J_{\rm AF}$ has been investigated via large-scale Monte Carlo (MC) simulations. Results for two-orbitals are also briefly discussed. Focusing on electronic density $n$=0.75, a regime of competition between ferromagnetic (FM) metallic and charge-ordered (CO) insulating states was identified. In the vicinity of the associated bicritical point, colossal magnetoresistance (CMR) effects were observed. The CMR is associated with the development of short-distance correlations among polarons, above the spin ordering temperatures, resembling the charge arrangement of the low-temperature CO state.
dc.description4 pages, 4 figures, accepted for publication in the Phys. Rev. Lett
dc.identifierhttps://arxiv.org/abs/cond-mat/0702426
dc.identifierhttp://arxiv.org/abs/cond-mat/0702426
dc.identifierPhys. Rev. Lett. 98, 127202 (2007)
dc.identifierdoi:10.1103/PhysRevLett.98.127202
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/126086
dc.subjectStrongly Correlated Electrons
dc.subjectMaterials Science
dc.titleCompeting Ferromagnetic and Charge-Ordered States in Models for Manganites: the Origin of the CMR Effect
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