Late transition metal oxides with infinite-layer structure: Nickelates versus cuprates
Late transition metal oxides with infinite-layer structure: Nickelates versus cuprates
The correlated electronic structure of the infinite-layer compounds ${\mathrm{NdNiO}}_{2}$ and ${\mathrm{SrCuO}}_{2}$ at stoichiometry and with finite hole doping is compared. Key differences are elucidated from an advanced first-principles many-body perspective. Contrary to the charge-transfer insulating cuprate, the self-doped nickelate remains noninsulating even for large interaction strength, though the Ni-${d}_{{x}^{2}\ensuremath{-}{y}^{2}}$ spectral …