Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2001-11-14
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, 3 figures, revetex4
Scientific paper
In 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.
Daoud-Aladine Aziz
Fernandez-Diaz M.-T.
Pinsard-Gaudart Loreynne
Revcolevschi Alexandre
Rodriguez-Carvajal J.
No associations
LandOfFree
Single crystal structural study of the charge ordered phase of Pr0.6Ca0.4MnO3: electronic localization beyond the atomic level does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Single crystal structural study of the charge ordered phase of Pr0.6Ca0.4MnO3: electronic localization beyond the atomic level, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Single crystal structural study of the charge ordered phase of Pr0.6Ca0.4MnO3: electronic localization beyond the atomic level will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-720928