kagome Weyl铁磁体Fe3Sn单晶中的大反常霍尔效应

IF 3.2 2区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Physical Review B Pub Date : 2023-08-28 DOI:10.1103/PhysRevB.108.075164

B. Belbase, Linda Ye, B. Karki, J. I. Facio, J. You, J. Checkelsky, J. van den Brink, M. Ghimire

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引用次数: 0

摘要

kagome金属的材料类别迅速发展，并已建立了一个领域来探索电子拓扑和磁性之间的相互作用。在这项工作中，我们报告了铁磁性金属铁$_3$锡的异常霍尔效应的理论和实验相结合的研究。该化合物在725 K时磁性有序，表现出易平面各向异性。在低于室温的单晶中进行霍尔测量会产生异常的霍尔电导率$\sigma_{xy}\sim500\,(\Omega\textrm{cm})^{-1}$，发现它对温度的依赖性很弱。这个值与密度泛函计算得到的带本征贡献很好地吻合。我们的计算也得到了正确的磁各向异性能量，并预测了费米能量附近Weyl节点的存在。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Large anomalous Hall effect in single crystals of the kagome Weyl ferromagnet Fe3Sn

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.

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来源期刊

Physical Review B PHYSICS, CONDENSED MATTER-

CiteScore

6.30

自引率

32.40%

发文量

4177

期刊介绍： Physical Review B (PRB) is the world’s largest dedicated physics journal, publishing approximately 100 new, high-quality papers each week. The most highly cited journal in condensed matter physics, PRB provides outstanding depth and breadth of coverage, combined with unrivaled context and background for ongoing research by scientists worldwide. PRB covers the full range of condensed matter, materials physics, and related subfields, including: -Structure and phase transitions -Ferroelectrics and multiferroics -Disordered systems and alloys -Magnetism -Superconductivity -Electronic structure, photonics, and metamaterials -Semiconductors and mesoscopic systems -Surfaces, nanoscience, and two-dimensional materials -Topological states of matter