Large anomalous Hall effect in single crystals of the kagome Weyl ferromagnet Fe3Sn
Large anomalous Hall effect in single crystals of the kagome Weyl ferromagnet Fe3Sn
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DOI：
10.1103/physrevb.108.075164
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发表时间：
2023-08
影响因子：
3.7
通讯作者：
B. Belbase;Linda Ye;B. Karki;J. I. Facio;J. You;J. Checkelsky;J. van den Brink;M. Ghimire
中科院分区：
文献类型：
--
作者：
B. Belbase;Linda Ye;B. Karki;J. I. Facio;J. You;J. Checkelsky;J. van den Brink;M. Ghimire
戈薇金属的材料类别迅速发展，并已成为探索电子拓扑和磁性之间相互作用的领域。在这项工作中，我们报告了一个结合的理论和实验研究的铁磁可果美金属Fe$_3$Sn的反常霍尔效应。该化合物在725 K磁性有序，并呈现易面各向异性。在室温以下的单晶中进行霍尔测量，得到一个反常的霍尔电导率$\sigma_{xy}\sim 500\，（\Omega\textrm{cm}）^{-1}$，它对温度的依赖性很弱。该值与密度泛函计算得到的能带本征贡献吻合得很好。我们的计算也得到了正确的磁各向异性能，并预测在费米能附近存在外尔节点。
The material class of kagome metals has rapidly grown and has been established as a field to explore the interplay between electronic topology and magnetism. In this work, we report a combined theoretical and experimental study of the anomalous Hall effect of the ferromagnetic kagome metal Fe$_3$Sn. The compound orders magnetically at 725 K and presents an easy-plane anisotropy. Hall measurements in single crystals below room temperature yield an anomalous Hall conductivity $\sigma_{xy}\sim500\,(\Omega\textrm{cm})^{-1}$, which is found to depend weakly on temperature. This value is in good agreement with the band-intrinsic contribution obtained by density-functional calculations. Our calculations also yield the correct magnetic anisotropy energy and predict the existence of Weyl nodes near the Fermi energy.