The predominant Ni-multiorbital nature of infinite-layer neodynium nickelate at stoichiometry and with doping is revealed. We investigate the correlated electronic structure of NdNiO${}_2$ at lower temperatures and show that first-principles many-body theory may account for Kondo(-lattice) features. Yet those are not only based on localized Ni-$d_{x^2-y^2}$ and a Nd-dominated self-doping band, but heavily builds on the participation of Ni-$d_{z^2}$ in a Hund-assisted manner. In a tailored three-orbital study, the half-filled regime of the former inplane Ni orbital remains surprisingly robust even for substantial hole doping $\delta$. Reconstructions of the interacting Fermi surface designate the superconducting region within the experimental phase diagram. They furthermore provide clues to recent Hall measurements as well as to the astounding weakly-insulating behavior at larger experimental $\delta$. Finally, a strong asymmetry between electron and hole doping, with a revival of Ni single-orbital features in the former case, is predicted. Superconductivity in Nd${}_{1-x}$Sr${}_x$NiO${}_2$ is unlike the one in cuprates of distinct multiorbital kind, building up on nearly localized Ni-$d_{x^2-y^2}$ and itinerant Ni-$d_{z^2}$.

中文翻译：

---

多轨道过程统治Nd1-xSrxNiO2正常状态

揭示了在化学计量和掺杂下无限层镍酸钕的主要Ni-多轨道性质。我们研究了NdNiO的相关电子结构${}_2$在较低的温度下显示第一原理多体理论可能解释了Kondo（-lattice）特征。但是，这些不仅基于本地化的Ni-$d_{X^2-{ÿ}^2}$ 和一个以Nd为主的自掺杂带，但很大程度上要依靠Ni-$d_{{ž}^2}$以Hund协助的方式。在一项量身定制的三轨道研究中，即使对于大量的空穴掺杂，前面的镍内轨道的半填充状态仍具有惊人的鲁棒性$\delta$。相互作用的费米表面的重建指定了实验相图中的超导区域。它们还为最近的霍尔测量以及较大的实验中令人震惊的弱绝缘行为提供了线索。$\delta$。最后，预计在电子和空穴掺杂之间存在强烈的不对称性，在前一种情况下将恢复Ni单轨道特征。钕超导${}_{\mathrm{1个}-X}$r${}_X$氧化镍${}_2$ 不同于独特的多轨道种类的铜价，它建立在几乎局部的Ni-$d_{X^2-{ÿ}^2}$ 和流动镍$d_{{ž}^2}$。