Lattice and superexchange effects in doped CMR manganites

Details Lattice and superexchange effects in doped CMR manganites Lattice and superexchange effects in doped CMR manganites

2003-04-22

arxiv.org/abs/cond-mat/0304491v1

J. Magn. Magn. Mater. 272-276, 92 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

2 pages, 1 figure, submitted to ICM 2003

Scientific paper

10.1016/j.jmmm.2003.11.089

We report on the influence of the lattice degrees of freedom on charge, orbital and spin correlations in colossal magnetoresistance (CMR) manganites. For the weakly doped compounds we demonstrate that the electron-phonon coupling promotes the trapping of charge carriers, the disappearance of the orbital polaron pattern and the breakdown of ferromagnetism at the CMR transition. The role of different superexchange interactions is explored.

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