Localization of strongly correlated electrons as Jahn-Teller polarons in manganites

Abstract

A realistic modeling of manganites should include the Coulomb repulsion between $e_g$ electrons, the Hund's rule coupling to $t_{2g}$ spins, and Jahn-Teller phonons. Solving such a model by dynamical mean field theory, we report large magnetoresistances and spectra in good agreement with experiments. The physics of the unusual, insulating-like paramagnetic phase is determined by correlated electrons which are-due to strong correlations-easily trapped as Jahn-Teller polarons.

arXiv comment4 pages, 3 figures

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• Polaron dynamics and decoherence in an interacting two-spin system coupled to optical phonon environment
• The importance of electronic correlations in exploring the exotic phase diagram of layered Li${}_x$MnO${}_2$
• Dynamical mean field theory for manganites
• Competing Correlated Insulators in multi-orbital systems coupled to phonons
• Anisotropic hybridization in a new Kondo lattice compound CeCoInGa${}_3$