Topotactical Hydrogen Induced Single-Band $d$-wave Superconductivity in La${}_2$NiO${}_4$

Ying Gao, Wenfeng Wu, Zhaoxin Liu +2

La${}_2$NiO${}_4$ is an antiferromagnetic insulator with a structural resemblance to its cuprate counterpart, La${}_2$CuO${}_4$. However, La${}_2$CuO${}_4$ has a Cu${}^{2+}$ or 3$d^9$ electronic…