磁化
之字形的
凝聚态物理
物理
职位(财务)
齐次空间
平面(几何)
格子(音乐)
交叉口(航空)
几何学
磁场
量子力学
数学
工程类
航空航天工程
经济
声学
财务
作者
Bin Han,Junjie Zeng,Zhenhua Qiao
标识
DOI:10.1088/0256-307x/39/1/017302
摘要
We theoretically demonstrate that the electronic second-order topological insulator with robust corner states, having a buckled honeycomb lattice, can be realized in bismuthene by inducing in-plane magnetization. Based on the sp 3 Slater–Koster tight-binding model with parameters extracted from first-principles results, we show that spin-helical edge states along zigzag boundaries are gapped out by the in-plane magnetization whereas four robust in-gap electronic corner states at the intersection between two zigzag boundaries arise. By regulating the orientation of in-plane magnetization, we show different position distribution of four corner states with different energies. Nevertheless, it respects some spatial symmetries and thus can protect the higher-order topological phase. Combined with the Kane–Mele model, we discuss the influence of the magnetization orientation on the position distribution of corner states.
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