论文标题
密切相关的材料中的困境：洪德的金属与相对论莫特绝缘子
Dilemma in strongly correlated materials: Hund's metal vs relativistic Mott insulator
论文作者
论文摘要
我们指出，在相关材料中，Hund的耦合与自旋轨道耦合之间的通用竞争，这项竞争导致了Hund的金属与相对论绝缘子之间的电子难题。 Hund的金属是指可能是绝缘子的命运，其中Hund的耦合抑制了相关性，并将系统驱动到相关的金属中。相对论的莫特绝缘子是指相对论旋转轨道耦合增强相关性并将系统驱动到莫特绝缘体的命运。这些矛盾的趋势自然存在于许多相关材料中。我们研究了Hund在相关材料中的耦合与自旋轨道耦合之间的竞争，并探索了这两个矛盾趋势的相互作用和平衡。该系统可以成为旋转轨道耦合的金属或Hund的辅助相对论Mott绝缘子。我们的观察结果可以找到与许多具有多个轨道的相关材料的广泛应用和相关性。
We point out the generic competition between the Hund's coupling and the spin-orbit coupling in correlated materials, and this competition leads to an electronic dilemma between the Hund's metal and the relativistic insulators. Hund's metals refer to the fate of the would-be insulators where the Hund's coupling suppresses the correlation and drives the systems into correlated metals. Relativistic Mott insulators refer to the fate of the would-be metals where the relativistic spin-orbit coupling enhances the correlation and drives the systems into Mott insulators. These contradictory trends are naturally present in many correlated materials. We study the competition between Hund's coupling and spin-orbit coupling in correlated materials and explore the interplay and the balance from these two contradictory trends. The system can become a spin-orbit-coupled Hund's metal or a Hund's assisted relativistic Mott insulator. Our observation could find a broad application and relevance to many correlated materials with multiple orbitals.
