63 Cu and 17 O NMR of electron-doped cuprates

The electron-doped cuprates have scarcely been investigated particularly with nuclear magnetic resonance (NMR), but promise further insight into the still unresolved mechanism of high-temperature superconductivity. We present results of 63Cu and 17O NMR of electron-doped Pr2-xCexCuO4 probing the electronic structure locally. Using double resonance methods we were able to separate signals from different sites, which allows a comparison to the electronic structure of hole-doped materials. Interestingly, despite some clear differences our findings suggest the presence of a two-component electronic fluid as is increasingly accepted to be the case in the hole-doped cuprates and associated with their curious normal-state properties.