Dynamical mean field theory for manganites

Details Dynamical mean field theory for manganites Dynamical mean field theory for manganites

2009-03-17

arxiv.org/abs/0903.2989v2

Physics

Condensed Matter

Strongly Correlated Electrons

11 pages, 18 figures In the 2nd version the only change is to correct one (important) reference

Scientific paper

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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