论文标题
铁磁$ \ textrm {fe} _3 \ textrm {sn} _2 $带呼吸kagome biLayers的三维电子结构
Three-dimensional electronic structure in ferromagnetic $\textrm{Fe}_3\textrm{Sn}_2$ with breathing kagome bilayers
论文作者
论文摘要
在Ferromagnetic $ \ textrm {fe} _3 \ textrm {sn} _2 $带有呼吸kagome biLayers中，已经观察到了大型异常效应（AHE）。为了了解这一点的基本机制，我们研究了$ \ textrm {fe} _3 \ textrm {sn} _2 $的电子结构，该电子结构是通过角度分辨光发射光谱（ARPES）进行的。特别是，我们同时使用真空紫外线（VUV）和软X射线（SX），它们分别允许表面敏感和相对较大的敏感测量，并将大量状态与表面状态区分开，这应该与AHE相关。虽然Vuv-arpes观察到二维带主要是由于表面状态引起的，但SX-ARPES揭示了三维带分散体，并具有周期性的菱形统一单位细胞。我们的数据表明，基于密度功能理论的理论计算具有良好的一致性，这表明有可能$ \ textrm {fe} _3 \ textrm {sn} _2 $是磁性的Weyl半含量。
A large anomalous Hall effect (AHE) has been observed in ferromagnetic $\textrm{Fe}_3\textrm{Sn}_2$ with breathing kagome bilayers. To understand the underlying mechanism for this, we investigate the electronic structure of $\textrm{Fe}_3\textrm{Sn}_2$ by angle-resolved photoemission spectroscopy (ARPES). In particular, we use both vacuum ultraviolet light (VUV) and soft x ray (SX), which allow surface-sensitive and relatively bulk-sensitive measurements, respectively, and distinguish bulk states from surface states, which should be unlikely related to the AHE. While VUV-ARPES observes two-dimensional bands mostly due to surface states, SX-ARPES reveals three-dimensional band dispersions with a periodicity of the rhombohedral unit cell in the bulk. Our data show a good consistency with a theoretical calculation based on density functional theory, suggesting a possibility that $\textrm{Fe}_3\textrm{Sn}_2$ is a magnetic Weyl semimetal.
