A large anomalous Hall effect (AHE) has been observed in ferromagnetic ${Fe}_3{Sn}_2$ with breathing kagome bilayers. To understand the underlying mechanism for this, we investigate the electronic structure of ${Fe}_3{Sn}_2$ by angle-resolved photoemission spectroscopy (ARPES). In particular, we use both of vacuum ultraviolet light (VUV) and soft X-ray (SX), which allow surface- 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 ${Fe}_3{Sn}_2$ is a magnetic Weyl semimetal.

中文翻译：

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铁磁性Fe3Sn2的三维电子结构，具有呼吸双层

在铁磁中观察到大的异常霍尔效应（AHE） ${FË}_3{\mathrm{小号}ñ}_2$与呼吸的kagome双层。为了了解其潜在机制，我们研究了${FË}_3{\mathrm{小号}ñ}_2$通过角度分辨光发射光谱（ARPES）。特别是，我们同时使用真空紫外光（VUV）和软X射线（SX），它们分别允许进行表面敏感和相对体积敏感的测量，并可以将体积状态与表面状态区分开，这不太可能与表面状态相关。 AHE。VUV-ARPES主要由于表面状态而观察到二维带，而SX-ARPES则揭示了菱形体单元中具有周期性的三维带分散。我们的数据与基于密度泛函理论的理论计算具有很好的一致性，这表明${FË}_3{\mathrm{小号}ñ}_2$ 是磁性Weyl半金属。