Polaron coherence condensation as the mechanism for colossal magnetoresistance in layered manganites
Polaron coherence condensation as the mechanism for colossal magnetoresistance in layered manganites
Angle-resolved photoemission spectroscopy data for the bilayer manganite La1.2Sr1.8Mn2O7 show that, upon lowering the temperature below the Curie point, a coherent polaronic metallic groundstate emerges very rapidly with well defined quasiparticles which track remarkably well the electrical conductivity, consistent with macroscopic transport properties. Our data suggest that the mechanism leading …