Single crystal structural study of the charge ordered phase of Pr0.6Ca0.4MnO3: electronic localization beyond the atomic level

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dc.creatorDaoud-Aladine, A.
dc.creatorRodriguez-Carvajal, J.
dc.creatorPinsard-Gaudart, L.
dc.creatorFernandez-Diaz, M. T.
dc.creatorRevcolevschi, A.
dc.date2001-11-14
dc.date2001-11-16
dc.date.accessioned2026-07-07T02:43:30Z
dc.date.available2026-07-07T02:43:30Z
dc.descriptionIn the R1/2D1/2MnO3 manganites (R: rare earth, D: divalent cation), the structural phase transition at Tco is commonly interpreted as a concomitant charge and orbital ordering (CO/OO) process driven by a cooperative Jahn-Teller effect and Coulomb repulsion forces. Full crystal structure refinement, from a neutron diffraction experiment below Tco on a Pr0.6Ca0.4MnO3 single crystal, gives us a model for the displacement of atoms with respect to the high temperature (HT) phase that invalidates the standard model based on the CO/OO picture. An alternative picture is that the phase transition and charge localization at Tco arise from a spatially ordered condensation of ferromagnetic Mn-Mn pairs, in which Mn atoms keeps an intermediate valence state.
dc.description5 pages, 3 figures, revetex4
dc.identifierhttps://arxiv.org/abs/cond-mat/0111267
dc.identifierhttp://arxiv.org/abs/cond-mat/0111267
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/18527
dc.subjectStrongly Correlated Electrons
dc.titleSingle crystal structural study of the charge ordered phase of Pr0.6Ca0.4MnO3: electronic localization beyond the atomic level
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