Phase-separation temperature in double-exchange manganites - art. no. 155103

Thermal fluctuation restores the segregated electronic phase to a homogeneo us one at a certain point, the phase-separation (PS) temperature T-PS. In t his paper, we theoretically investigate the dependence of the PS temperatur es on doping and magnetic field in single- and two-orbital double exchange models. We find the Polaronic effect favors the PS, and predict an optimize d separation temperature. Our results qualitatively interpret the novel ele ctronic behaviors in doped double-exchange manganites.