Fig. 2: DFT+DMFT spectral function.
From: Nickelate superconductors—a renaissance of the one-band Hubbard model
a–c DFT + DMFT k-integrated spectral function A(ω) of SrxNd1−xNiO2 at 0%, 20% and 30% Sr-doping, orbitally resolved for the Nd-5d and Ni-3d orbitals. d DFT + DMFT k-resolved spectral function A(ω) for Sr0.2Nd0.8NiO2. e Zoom-in of d. The DFT bands are shown as (white) lines for comparison. Around the Fermi level there is a single Ni-3\({d}_{{x}^{2}-{y}^{2}}\) orbital, as in the one-band Hubbard model with an additional Nd-5dxy pocket around the A-point as a hardly hybridising bystander.
