an eDMFT perspective*

Current interest in the nickelates, RNiO₂ (R=La, Nd) stem from the discovery of superconductivity in hole doped infinite-layer NdNiO₂. To understand the underlying physics, we performed self-consistent density functional theory with embedded dynamical mean field theory (eDMFT) calculations on LaNiO₂, simpler than NdNiO₂, nevertheless illuminating. Using the prototypical LaNiO₂ crystal structure we propose a temperature-correlation phase diagram. Depending on relevant computed quantities, the system exhibits varied behavior: Fermi liquid (FL) versus non-FL and magnetic versus non-magnetic Curie-Weiss. Computing the correlation strength in LaNiO2 using constrained eDMFT, we found the compound to be non-magnetic, which is consistent with neutron scattering experiments on RNiO₂.