Vibronic polarons: comments on a model for the colossal field-resistance effects in manganites

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dc.creatorGeorgiev, Mladen
dc.date2007-12-21
dc.date.accessioned2026-07-07T08:51:06Z
dc.date.available2026-07-07T08:51:06Z
dc.descriptionIn addition to mechanisms already proposed to account for the formation in manganites of a small-polaron superlattice above the Curie temperature Tc and to a metallic-like sea of large polarons below Tc, we now consider other observed colossal-resistance inducing fields, such as magnetic, electric, photon, or strain fields. We attribute the charge-ordered phase formation to the occurrence of strong dipolar binding of vibronic small polarons arising from the phonon coupling of highly polarizable two-level orbital systems. These species having associated inherent electric and magnetic off-center dipoles, they couple to the external fields leading to the observed colossal effects. The random phase appears due to polaron band widening in the external field.
dc.description8 pages with 4 figures, all pdf format
dc.identifierhttps://arxiv.org/abs/0712.3803
dc.identifierhttp://arxiv.org/abs/0712.3803
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/144820
dc.subjectMaterials Science
dc.subjectStrongly Correlated Electrons
dc.titleVibronic polarons: comments on a model for the colossal field-resistance effects in manganites
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