Altermagnetism is a topic that has lately been gaining attention and the ${\mathrm{RuO}}_2$ compound is among one of the most studied altermagnetic candidates. However, the survey of available literature on ${\mathrm{RuO}}_2$ properties suggests that there is no consensus about the magnetism of this material. By performing density functional theory (DFT) calculations, we show that the electronic properties of stoichiometric ${\mathrm{RuO}}_2$ are described in terms of a Hubbard $U$, within $\mathrm{DFT}+U$, smaller than the value required to have magnetism. We further argue that Ru vacancies can actually aid the formation of a magnetic state in ${\mathrm{RuO}}_2$. This in turn suggests that a characterization of the amount of Ru vacancies in experimental samples might help the resolution of the controversy between the different experimental results.

中文翻译：

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原型交流磁体 RuO2 中磁序的脆弱性

交变磁学是最近受到关注的一个话题，${\mathrm{氧化钌}}_2$化合物是研究最多的交变磁候选化合物之一。然而，对现有文献的调查${\mathrm{氧化钌}}_2$特性表明，对于这种材料的磁性还没有达成共识。通过执行密度泛函理论（DFT）计算，我们表明化学计量的电子特性${\mathrm{氧化钌}}_2$用 Hubbard 来描述$U$， 之内$\mathrm{密度泛函理论}+U$，小于具有磁性所需的值。我们进一步认为，Ru 空位实际上可以帮助磁性状态的形成${\mathrm{氧化钌}}_2$。这反过来表明，实验样品中Ru空位数量的表征可能有助于解决不同实验结果之间的争议。