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arXiv · 0903.2989

Dynamical mean field theory for manganites

Y. -F. Yang·K. Held
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Abstract

Doped and undoped manganites are modeled by the coupling between itinerant $e_g$ electrons and static $t_{2g}$ spins, the Jahn-Teller and breathing phonon modes, and the Coulomb interaction. We provide for a careful estimate of all parameters and solve the corresponding Hamiltonian by dynamical mean field theory. Our results for the one-electron spectrum, the optical conductivity, the dynamic and static lattice distortion, as well as the Curie temperature show the importance of all of the above ingredients for a realistic calculation as well as for describing the unusual dynamical properties of manganites including the insulating parent compound and the insulating-like paramagnetic state of doped manganites.

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Y. -F. Yang, K. Held. 2009-03-20. Dynamical mean field theory for manganites. https://doi.org/10.1103/physrevb.82.195109

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