论文标题
磁性拓扑半学Co $ _3 $ sn $ _ {2-x} $ in $ _x $ s $ _2 $
Enhanced Anomalous Hall Effect in Magnetic Topological Semimetal Co$_3$Sn$_{2-x}$In$_x$S$_2$
论文作者
论文摘要
我们研究了单晶Co $ _3 $ _3 $ _3 $ _ {2-x} $在$ _x $ s $ _2 $ _2 $ _2 $ _2 $ _2 $ _2 $ s $ s $ _2 $从0中从0到1的数量从0到1逐渐增加，而从ferromagnotic weyl weyl weyl weyl semagn strance x逐渐增加，我们的磁化逐渐减少了X逐渐减少X逐渐减少，而不是，我们研究了单晶的效果（AHE）。值得注意的是，在系统地缩放AHE之后，我们发现它们的固有异常电导率（AHC）的最大值在x = 0.15左右。固有AHC的变化与浆果曲率的掺杂演化相对应，最大值来自磁性拓扑结节环间隙。我们的实验结果表明，在基本结节环上的AHC比Weyl节点的差距更大。
We study the anomalous Hall Effect (AHE) of single-crystalline Co$_3$Sn$_{2-x}$In$_x$S$_2$ over a large range of indium concentration x from 0 to 1. Their magnetization reduces progressively with increasing x while their ground state evolves from a ferromagnetic Weyl semimetal into a nonmagnetic insulator. Remarkably, after systematically scaling the AHE, we find that their intrinsic anomalous Hall conductivity (AHC) features an unexpected maximum at around x = 0.15. The change of the intrinsic AHC corresponds with the doping evolution of Berry curvature and the maximum arises from the magnetic topological nodal-ring gap. Our experimental results show a larger AHC in a fundamental nodal-ring gap than that of Weyl nodes.
