论文标题
稀有地球菌株的稀有拓扑过渡到非平凡的拓扑过渡
Trivial to nontrivial topology transition in rare-earth pnictides with epitaxial strain
论文作者
论文摘要
磁通型和拓扑特性的结合引起了人们对稀土单刺的半法的极大关注。对于其中一些（例如LASB），尚不清楚它们是否基于密度功能理论计算和角度分辨的光发射光谱测量表现出非平凡的拓扑结构。在这里，我们使用混合密度功能理论来证明LASB实际上是一个与实验一致的微不足道的拓扑半学，但在过渡到拓扑阶段的边缘。我们表明，在压缩的外延菌株下，La $ d $带横穿了X $ _3 $ _3 $点附近的Brillouin区域的SB $ P $ Band，稳定了拓扑上的非平凡阶段，为探测磁铁托管属性与频带拓扑的效果之间的磁性较小和未呈现的材料的效果，为探测磁铁托管属性和效果的效果的效果相同。
The combination of magneto-transport and topological properties has brought great attention to rare-earth mono-pnictides semimetals. For some of them, like LaSb, it is unclear whether they show non-trivial topology or not based on density functional theory calculations and angular resolved photoemission spectroscopy measurements. Here, we use hybrid density functional theory to demonstrate that LaSb is in fact a trivial topological semimetal, in agreement with experiments, but on the verge of a transition to a topological phase. We show that under compressive epitaxial strain, the La $d$ band crosses the Sb $p$ band near the X$_3$ point in the Brillouin zone, stabilizing a topologically non-trivial phase, opening unique opportunities to probe the inter-relation between magneto-transport properties and the effects of band topology by examining epitaxially strained and unstrained thin films of the same material.
