Electron doped layered nickelates: Spanning the phase diagram of the cuprates

To elucidate the nature of high-temperature superconductivity in the cuprates, it would be helpful to find other transition metal oxides with cupratelike electronic structures to test theories about the origin of superconductivity. Using $a\phantom{\rule{0}{0ex}}b$ $i\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}o$ calculations, this paper proposes low-valence layered nickelates as the closest analogue to cuprates. Doping metallic Pr${}_{4}$Ni${}_{3}$O${}_{8}$ with cerium should allow researchers to span the range of the cuprate phase diagram where superconductivity is observed. If this results in a superconducting nickelate, a long-sought goal, it could be a game changer in the field of high-temperature superconductivity.