Inspired by a recently proposed superconducting mechanism for a new cuprate superconductor ${\mathrm{Ba}}_2{\mathrm{CuO}}_{3+\delta }$, we theoretically design an unconventional nickelate superconductor with a $d^8$ electron configuration. Our strategy is to enlarge the on-site energy difference between $3d_{x^2-y^2}$ and other $3d$ orbitals by adopting halogens or hydrogen as out-of-plane anions, so that the $3d$ bands other than $d_{x^{-}{y}^2}$ lie just below the Fermi level for the $d^8$ configuration, acting as incipient bands that enhance superconductivity. We also discuss a possible relevance of the present proposal to the recently discovered superconductor $(\mathrm{Nd},\mathrm{Sr}){\mathrm{NiO}}_2$.

中文翻译：

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利用混合阴离子策略设计具有8位构型的镍酸超导体

受到最近提出的用于新型铜酸盐超导体的超导机制的启发 ${巴}_2{\mathrm{氧化铜}}_{3+\delta }$，我们从理论上设计了一种非常规的含镍超导体 $d^8$电子配置。我们的策略是扩大现场之间的能量差$3d_{X^2-{ÿ}^2}$ 和别的 $3d$ 通过采用卤素或氢作为平面外阴离子进入轨道 $3d$ 乐队以外的乐队 $d_{X^{-}{ÿ}^2}$ 在费米水平之下 $d^8$构型，充当增强超导性的初始带。我们还将讨论本建议与最近发现的超导体的可能关联性$（钕，r）{\mathrm{氧化镍}}_2$。