Charge ordering in oxides : a conundrum solved by resonant diffraction

Joly, Y.; Grenier, S.; Lorenzo, J. E.

Charge ordering in oxides : a conundrum solved by resonant diffraction

Authors

Joly, Y.

Grenier, S.

Lorenzo, J. E.

Description

We show that in mixed-valence 3d transition metal oxides undergoing a structural transition, the low temperature phase results from an effective ordering of the charge. This arrangement and the quantitative evaluation of the atomic charges are determined by using resonant x-ray scattering experiments further analyzed with the help of ab initio calculations of the corresponding scattering factors. We have found that this reorganization concerns only a small fraction of electron and is necessary to reconcile all the experimental data.
4 pages, 2 figures