Multiorbital systems such as the iron-based superconductors provide a new avenue to attack the longstanding problem of superconductivity in strongly correlated systems. In this work we study the superconductivity driven by a generic bosonic mechanism in a multiorbital model including the full dynamical electronic correlations induced by the Hubbard $U$ and the Hund’s coupling. We show that superconductivity survives much more in a Hund’s metal than in an ordinary correlated metal with the same degree of correlation. The redistribution of spectral weight characteristic of the Hund’s metal reflects also in the enhancement of the orbital-selective character of the superconducting gaps, in agreement with experiments in iron-based superconductors.

中文翻译：

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洪德驱动的相关性与玻色子介导的超导之间的协同作用

诸如铁基超导体之类的多轨道系统提供了一种新途径，可以解决强相关系统中长期存在的超导问题。在这项工作中，我们研究了多轨道模型中由通用玻色子机理驱动的超导性，其中包括由哈伯德引起的全动态电子相关性$ü$和洪德的耦合。我们表明，与具有相同相关度的普通相关金属相比，在洪德金属中的超导性得以保留的更多。与铁基超导体的实验一致，洪德金属的光谱重量特征的重新分布还反映出超导间隙的轨道选择特性的增强。