论文标题
部分可观测时空混沌系统的无模型预测
Magnetic, transport and topological properties of Co-based shandite thin films
论文作者
论文摘要
基于CO的Shandite CO3SN2S2的Kagome Ferromagnet显示出与Weyl节点相关的较大的异常霍尔效应（AHE）。预计具有Co Kagome单层的薄膜显示出量子AHE，这正在等待实验性实现。但是，精确预测Weyl节点如何驻留在晶格和电子结构通常与大体不同的薄膜中。在这里，我们报告了具有SN或S表面终止的CO3SN2S2的薄膜的全面AB从头开始结果。我们发现，所有SNED膜都稳定了类似于散装的铁磁状态，并将大的AHE保留到量化AHE的单层极限，而磁性和拓扑性能则随着S端膜中的Co层数巨大变化。我们的结果将刺激对薄的Weyl材料的进一步实验探索。
The kagome ferromagnet, Co-based shandite Co3Sn2S2, shows a large anomalous Hall effect (AHE) associated with the Weyl nodes. A thin film with a Co kagome monolayer was predicted to exhibit the quantum AHE, which awaits the experimental realisation. However, it is challenging to precisely predict how the Weyl nodes reside in thin films where the lattice and electronic structures are in general different from the bulk. Here we report comprehensive ab initio results for thin films of Co3Sn2S2 with one, two and three Co layers with Sn or S surface terminations. We find that all the Sn-end films stabilise a ferromagnetic state similar to the bulk, and retain the large AHE down to the monolayer limit where the AHE is quantised, while the magnetic and topological properties drastically change with the number of Co layers in the S-end films. Our results would stimulate further experimental exploration of thin Weyl materials.
