Evolution of Electronic Correlations in the Ruddlesden-Popper Nickelates

Zhe Liu, Jie Li, Mengwu Huo +10

We report on optical studies of the Ruddlesden-Popper nickelates La${}_{n+1}$Ni${}_n$O${}_{3n+1}$ with $n=2$ (La${}_3$Ni${}_2$O${}_7$), $n=3$ (La${}_4$Ni${}_3$O${}_{10}$) and $n = \i…