Electronic Correlations in Manganites

Details Electronic Correlations in Manganites Electronic Correlations in Manganites

1999-09-21

arxiv.org/abs/cond-mat/9909311v2

Phys. Rev. Lett. 84, 5168 (2000)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures, RevTex; some explanations added; to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.84.5168

The influence of local electronic correlations on the properties of colossal magnetoresistance manganites is investigated. To this end, a ferromagnetic two-band Kondo lattice model is supplemented with the local Coulomb repulsion missing in this model, and is analyzed within dynamical mean-field theory. Results for the spectral function, optical conductivity, and the paramagnetic-to-ferromagnetic phase transition show that electronic correlations have drastic effects and may explain some experimental observations.

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