Dynamical mean field theory for manganites

Article

关键词: ELECTRONIC-STRUCTURE CALCULATIONS;    TO-POLARON CROSSOVER;    CHARGE-ORDERED STATE;    DOUBLE-EXCHANGE;    COLOSSAL-MAGNETORESISTANCE;    PRINCIPLES CALCULATIONS;    CORRELATED SYSTEMS;    METAL TRANSITION;    MAGNETIC-FIELD;    SPECTRA;   

DOI  :  10.1103/PhysRevB.82.195109

来源: SCIE

【 摘 要 】

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 insulatinglike paramagnetic state of doped manganites.

【 授权许可】

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