National Natural Science Foundation of China [11874092]; Fok Ying-Tong Education Foundation, China [161005]; Science Fund for Distinguished Young Scholars of Hunan Province [2021JJ10039]; Postgraduate Sci-entific Research Innovative Project of Hunan Province [CX20230930]
机构署名：
本校为第一且通讯机构
院系归属：
物理与电子科学学院
摘要：
Two-dimensional (2D) second-order topological insulators (SOTIs) with corner states have recently attracted significant interest. It is fascinating to explore the coupling of corner states with additional degrees of freedom. Here, we propose that layer-polarized corner states can be induced by a perpendicular electric field in the AAstacking bilayer 2D SOTIs. Our result reveals that the transition between non-layer-polarized and layer-polarized corner states depends on the interlayer exchange symmetry, which can be controlled by the perpendicular electric field. This finding is further verifie...
