Jahn-Teller distortion and electronic correlation effects in undoped manganese perovskites

Details Jahn-Teller distortion and electronic correlation effects in undoped manganese perovskites Jahn-Teller distortion and electronic correlation effects in undoped manganese perovskites

1998-10-15

arxiv.org/abs/cond-mat/9810185v1

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages revtex + 5 figures included

Scientific paper

10.1103/PhysRevB.59.9923

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.

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