Correlated electronic structure of a 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 RNiO${}_2$ ($n=\mathrm{\infty }$) and R${}_6$Ni${}_5$O${}_{12}$ ($n=5$). 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 more cuprate-like without the need for chemical doping.