论文标题
Kagome金属中的笨拙的签名
Signatures of Hundness in Kagome Metals
论文作者
论文摘要
通过密度功能理论与动态平均场理论结合使用，我们试图检查六边形FEGE的电子结构，其中Fe原子形成了准2D层的Kagome晶格。我们预测这是一种代表性的kagome金属，其特征是轨道选择性狄拉克费米和极其平坦的频带。此外，Fe的3 $ d $电子密切相关。它们表现出由Hund的规则耦合引起的电子相关性的明显特征，例如在带状重归其化，非纤维液体行为，自旋冻结状态和自旋轨道分离的大量分化。因此，Fege可以被视为研究Kagome物理学和hundness的相互作用的理想平台。 5
By means of the density functional theory in combination with the dynamical mean-field theory, we tried to examine the electronic structure of hexagonal FeGe, in which the Fe atoms form a quasi-2D layered Kagome lattice. We predict that it is a representative Kagome metal characterized by orbital selective Dirac fermions and extremely flat bands. Furthermore, Fe's 3$d$ electrons are strongly correlated. They exhibit quite apparent signatures of electronic correlation induced by Hund's rule coupling, such as sizable differentiation in band renormalization, non-Fermi-liquid behavior, spin-freezing state, and spin-orbital separation. Thus, FeGe can be regarded as an ideal platform to study the interplay of Kagome physics and Hundness. 5
