Theory of manganite superlattices

Article

关键词: TO-POLARON CROSSOVER;    CRYSTAL DISTORTION;    INTERFACE;    MAGNETORESISTANCE;    INSULATOR;    OXIDES;   

DOI  :  10.1103/PhysRevB.78.184405

来源: SCIE

【 摘 要 】

A theoretical model is proposed for the (0,0,1) superlattice manganite system (LaMnO(3))(n)(SrMnO(3))(m). The model includes the electron-electron, electron-phonon, and cooperative Jahn-Teller interactions. It is solved using a version of the single-site dynamical mean-field approximation generalized to incorporate the cooperative Jahn-Teller effect. The phase diagram and conductivities are calculated. The behavior of the superlattice is found to be a good approximation to be an average over the density-dependent properties of individual layers, with the density of each layer fixed by electrostatics.

【 授权许可】

Free