Bandwidth-control-induced insulator-metal transition inPr0.65(Ca1−ySry)0.35MnO3andPr0.7Ca0.3MnO3

Abstract

Both internal chemical pressure by ion substitution and external hydrostatic pressure induce an insulator-to-metal (I-M) transition in the ${\mathrm{Pr}}_{1\mathrm{\ensuremath{-}}\mathrm{x}}$${\mathrm{Ca}}_{\mathrm{x}}$${\mathrm{MnO}}_{3}$ system. The behavior of spin and charge ordering through the I-M transition has been studied with use of neutron diffraction techniques. As a function of effective pressure, we identify three different pressure regions for the low-temperature state.