Jahn-Teller distortion and electronic correlation effects in undoped manganese perovskites
arXiv:cond-mat/9810185 · doi:10.1103/PhysRevB.59.9923
Abstract
The formation of a long-range Jahn-Teller distortion in undoped manganites is studied within the dynamical mean-field theory taking both electron-phonon and electron-electron interactions into account. We find that the observed insulating behavior at temperatures above the Jahn-Teller transition and the bond-length changes below it can most naturally by explained by assuming a strong electronic repulsion and a rather weak electron-phonon coupling.
6 pages revtex + 5 figures included