Correlated electronic structure of superconducting quintuple-layer nickelate

We present a comparative density functional theory plus dynamical mean-field theory (DFT+DMFT) study of the two known superconducting members of the rare-earth layered nickelate family: hole-doped RNiO₂ (n=∞) and R₆Ni₅O₁₂ (n=5). At the same nominal carrier concentration, these two materials exhibit nearly identical electronic structures and many-body correlations effects: mass enhancements, self-energies, and occupations. However, the fermiology of the quintuple-layer nickelate is more two-dimensional-like than its infinite-layer counterpart making this new superconducting quintuple-layer nickelate already more cuprate-like without the the need of chemical doping.