论文标题
范德华（Van der Waals）的电子相关性Ferromagnet Fe $ _3 $ gete $ _2 $由其收费动态显示
Electronic correlations in the van der Waals ferromagnet Fe$_3$GeTe$_2$ revealed by its charge dynamics
论文作者
论文摘要
分层的范德华（Van der Waals）铁磁Fe $ _3 $ gete $ _2 $在拓扑和磁性之间存在非常规的相互作用，从而导致低温下的大型霍尔电导率。在这里，我们研究了其电荷动力学的温度依赖性，并揭示了以$ t_c \ sim 200 $ k进入铁磁状态后，进一步降低温度后，会逐渐从中边缘范围重新填充逐渐降低温度。这种两倍的光谱重量传递表明，洪德的耦合是电子相关性的主要来源，并在低温下向不连贯的交叉信号。我们的发现还传达了基于节点线拓扑状态的电子环境，有利于大型霍尔电导率。
The layered van der Waals ferromagnetic Fe$_3$GeTe$_2$ harbours an unconventional interplay between topology and magnetism, leading to a large anomalous Hall conductivity at low temperatures. Here, we investigate the temperature dependence of its charge dynamics and reveal that upon entering the ferromagnetic state at $T_C \sim 200$ K and further lowering the temperature there is the onset of a gradual spectral weight reshuffling from the mid-infrared range towards far- as well as near-infrared frequencies. This two-fold spectral weight transfer indicates the important role of the Hund's coupling as primary source for electronic correlations and signals an incoherent-coherent crossover at low temperatures. Our findings also convey the electronic environment, based on nodal-line topological states, favouring the large anomalous Hall conductivity.
