论文标题
磁化方向 - 可调kagome Weyl线
Magnetization-direction-tunable kagome Weyl line
论文作者
论文摘要
Kagome磁铁为多种拓扑量子现象提供了一个引人入胜的平台。在这里，利用角度分辨光发射光谱，我们在A-A堆叠的Kagome磁铁TBXGD1-XMN6SN6中展示了具有强平面外分散的WEYL线。在富含GD的侧，由于Kane-Mele自旋 - 轨道偶联，低位点对称性和平面磁性顺序之间存在显着的合作相互作用，Weyl线几乎保持了自旋轨道间隙。在TB取代下，由于磁重新定位了平面外顺序，Kagome Weyl线间隙。我们的结果说明了磁矩方向是一种有效的调谐旋钮，用于实现不同的三维拓扑阶段。
Kagome magnets provide a fascinating platform for a plethora of topological quantum phenomena. Here, utilizing angle-resolved photoemission spectroscopy, we demonstrate Weyl lines with strong out-of-plane dispersion in an A-A stacked kagome magnet TbxGd1-xMn6Sn6. On the Gd rich side, the Weyl line remains nearly spin-orbit-gapless due to a remarkable cooperative interplay between Kane-Mele spin-orbit-coupling, low site symmetry and in-plane magnetic order. Under Tb substitution, the kagome Weyl line gaps due to a magnetic reorientation to out-of-plane order. Our results illustrate the magnetic moment direction as an efficient tuning knob for realizing distinct three-dimensional topological phases.
