论文标题
铁相关性和铁基超导体的超导配对的轨道选择性
Orbital selectivity in electron correlations and superconducting pairing of iron-based superconductors
论文作者
论文摘要
电子相关性在基于铁的超导体中起着核心作用。在这些系统中，多个Fe $ 3D $ - 轨道在低能物理学中活跃，并且并非全部退化。由于这些原因，在基于铁的系统的研究中，轨道选择性相关性的作用一直是一个活跃的主题。在本文中，我们调查了有关该主题的最新发展。对于正常状态，我们强调了已经进行了广泛研究的轨道选择性莫特物理，尤其是在铁葡萄糖核化合物中，在电子填充$ n \ sim 6 $的情况下。另外，解决了轨道选择性和电子词性之间的相互作用。对于超导状态，我们总结了轨道选择配对的最初想法，并讨论了沿该方向的最新爆炸性活动。我们对几个新兴主题有了一些观点。其中包括轨道选择性相关性的演变，磁性和列表和超导性，因为电子填充因子从$ 6 $降低到$ 5 $，以及电子基于铁的超导体中电子相关性与拓扑结构之间的相互作用。
Electron correlations play a central role in iron-based superconductors. In these systems, multiple Fe $3d$-orbitals are active in the low-energy physics, and they are not all degenerate. For these reasons, the role of orbital-selective correlations has been an active topic in the study of the iron-based systems. In this paper, we survey the recent developments on the subject. For the normal state, we emphasize the orbital-selective Mott physics that has been extensively studied, especially in the iron chalcogenides, in the case of electron filling $n \sim 6$. In addition, the interplay between orbital selectivity and electronic nematicity is addressed. For the superconducting state, we summarize the initial ideas for orbital-selective pairing, and discuss the recent explosive activities along this direction. We close with some perspectives on several emerging topics. These include the evolution of the orbital-selective correlations, magnetic and nematic orders and superconductivity as the electron filling factor is reduced from $6$ to $5$, as well as the interplay between electron correlations and topological bandstructure in iron-based superconductors.
