${\mathrm{Sr}}_2{\mathrm{MoO}}_4$ is isostructural to the unconventional superconductor ${\mathrm{Sr}}_2{\mathrm{RuO}}_4$ but with two electrons instead of two holes in the $\mathrm{Mo}/\mathrm{Ru}\text{−}{t}_{2g}$ orbitals. Both materials are Hund’s metals, but while ${\mathrm{Sr}}_2{\mathrm{RuO}}_4$ has a van Hove singularity in close proximity to the Fermi surface, the van Hove singularity of ${\mathrm{Sr}}_2{\mathrm{MoO}}_4$ is far from the Fermi surface. By using density functional plus dynamical mean-field theory, we determine the relative influence of van Hove and Hund’s metal physics on the correlation properties. We show that theoretically predicted signatures of Hund’s metal physics occur on the occupied side of the electronic spectrum of ${\mathrm{Sr}}_2{\mathrm{MoO}}_4$, identifying ${\mathrm{Sr}}_2{\mathrm{MoO}}_4$ as an ideal candidate system for a direct experimental confirmation of the theoretical concept of Hund’s metals via photoemission spectroscopy.

中文翻译：

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Sr2MoO4和Sr2RuO4：解析洪德和范霍夫物理学的作用

$r_2{O}_4$ 对非常规超导体是同构的 $r_2{O}_4$ 但是有两个电子而不是两个空穴 $莫/茹\text{-}{Ť}_{2G}$轨道。两种材料都是洪德的金属，但是$r_2{O}_4$ 在费米表面附近具有van Hove奇异性 $r_2{O}_4$远离费米表面。通过使用密度泛函加动力学平均场理论，我们确定了范霍夫和洪德的金属物理学对相关性质的相对影响。我们表明，洪德金属物理学的理论预测特征出现在电子谱的占据侧。$r_2{O}_4$，确定 $r_2{O}_4$ 作为通过光发射光谱法直接实验确定洪德金属理论概念的理想候选系统。