Correlated polaron transport and metal-insulator transition in La1−xSrxMnO3

Abstract

The transport behavior of La1−xSrxMnO3 in the antiferromagnetic insulator, ferromagnetic insulator, and ferromagnetic metallic phases is shown to follow from the correlated polaron mechanism and a single transport equation accounts for the temperature dependence of resistivity for 0⩽x⩽0.40 in the 0–400K range. In the low temperature range zero-point lattice vibration plays a dominant role in the transport in the metallic phase.