论文标题
$ \ mathrm {fe_3gete_2} $：一种差异化金属
$\mathrm{Fe_3GeTe_2}$: A site-differentiated Hund metal
论文作者
论文摘要
从基本科学和设备应用的角度来看，二维（2D）范德华（VDW）材料中的磁性引起了很大的关注。显然，建立对磁性的详细和扎实的理解是迈向各种应用的关键第一步。尽管$ \ mathrm {fe_3gete_2} $是该家族中代表性的铁磁（FM）金属，但其磁性和电子行为的许多方面仍然难以捉摸。在这里，我们报告了我们的新发现，即$ \ mathrm {fe_3gete_2} $是一种特殊类型的相关金属，称为“ hund Metal”。此外，我们证明了这种材料中的金属性是通过表现出巨大的hund相关强度的显着地点依赖性的，因此被称为“位置分化的hund金属”。在这张新图片中，可以清楚地理解许多以前的实验，包括彼此之间看似矛盾的实验。
Magnetism in two-dimensional (2D) van der Waals (vdW) materials has lately attracted considerable attention from the point of view of both fundamental science and device applications. Obviously, establishing the detailed and solid understanding of their magnetism is the key first step toward various applications. Although $\mathrm{Fe_3GeTe_2}$ is a representative ferromagnetic (FM) metal in this family, many aspects of its magnetic and electronic behaviors still remain elusive. Here, we report our new finding that $\mathrm{Fe_3GeTe_2}$ is a special type of correlated metal known as 'Hund metal'. Furthermore, we demonstrate that Hund metallicity in this material is quite unique by exhibiting remarkable site-dependence of Hund correlation strength, hereby dubbed 'site-differentiated Hund metal'. Within this new picture, many of previous experiments can be clearly understood including the ones that were seemingly contradictory to one another.
