Dynamical mean field theory for manganites

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.

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

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Cited by in corpus (3)

• Size control of Charge-Orbital Order in Half-Doped Manganite, La${}_{0.5}$Ca${}_{0.5}$MnO${}_3$
• The importance of electronic correlations in exploring the exotic phase diagram of layered Li${}_x$MnO${}_2$
• Kinetics of orbital ordering in cooperative Jahn-Teller models: Machine-learning enabled large-scale simulations