Electron doped layered nickelates: spanning the phase diagram of the cuprates
arXiv:1705.01632 · doi:10.1103/PhysRevMaterials.1.021801
Abstract
PrNiO is an overdoped analog of hole-doped layered cuprates. Here we show via ab initio calculations that Ce-doped PrNiO (PrCeNiO) has the same electronic structure as the antiferromagnetic insulating phase of parent cuprates. We find that substantial Ce-doping should be thermodynamically stable and that other 4+ cations would yield a similar antiferromagnetic insulating state, arguing this configuration is robust for layered nickelates of low enough valence. The analogies with cuprates at different fillings suggest that intermediate Ce-doping concentrations near 1/8 should be an appropriate place to search for superconductivity in these low-valence Ni oxides.
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