论文标题
非中心对称性抗fiferromagnet $ \ mathrm {co} \ mathrm {nb} _3 \ mathrm {s} _6 $引起的大型异常霍尔效应。
Large anomalous Hall effect induced by weak ferromagnetism in the noncentrosymmetric antiferromagnet $\mathrm{Co}\mathrm{Nb}_3\mathrm{S}_6$
论文作者
论文摘要
我们研究了非中心对称性抗fiferromagnet $ \ mathrm {co} \ Mathrm {nb} _3 \ Mathrm {s} _6 _6 $ y MATHRM {nb} _6 $ y MATHRM {co} _6 $通过角度分辨的光感图谱（Arpes）和magneterneternetranternementsort的机制。从$ \ Mathrm {Co} \ Mathrm {nb} _3 \ Mathrm {s} _6 $及其家族化合物（$ \ Mathrm {fe} \ Mathrm {nb} _3 \ Mathrm {_3 \ Mathrm {s} _6 $和$ \ mathrm {ni} \ Mathrm {nb} _3 \ mathrm {s} _6 $），我们找到了在费米级附近存在的CO插入所独有的频段分散。我们进一步证明，在$ \ mathrm {co} \ Mathrm {nb} _3 \ Mathrm {s} _6 $中，硫的略有缺乏量消除了效能电磁和AHE，同时又几乎不改变了频带结构，同时表明了弱势竞争力的弱势竞争力是对大型AHE的负责人。根据我们的结果，我们建议在费米水平附近的Weyl点引起大AHE。
We study the mechanism of the exceptionally large anomalous Hall effect (AHE) in the noncentrosymmetric antiferromagnet $\mathrm{Co}\mathrm{Nb}_3\mathrm{S}_6$ by angle-resolved photoemission spectroscopy (ARPES) and magnetotransport measurements. From ARPES measurements of $\mathrm{Co}\mathrm{Nb}_3\mathrm{S}_6$ and its family compounds ($\mathrm{Fe}\mathrm{Nb}_3\mathrm{S}_6$ and $\mathrm{Ni}\mathrm{Nb}_3\mathrm{S}_6$), we find a band dispersion unique to the Co intercalation existing near the Fermi level. We further demonstrate that a slight deficiency of sulfur in $\mathrm{Co}\mathrm{Nb}_3\mathrm{S}_6$ eliminates the ferromagnetism and the AHE simultaneously while hardly changing the band structure, indicating that the weak ferromagnetism is responsible for the emergence of the large AHE. Based on our results, we propose Weyl points near the Fermi level to cause the large AHE.
