Electronic Correlations in Manganites
arXiv:cond-mat/9909311 · doi:10.1103/PhysRevLett.84.5168
Abstract
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.
4 pages, 3 figures, RevTex; some explanations added; to appear in Phys. Rev. Lett