Transport features of topological corner states in honeycomb lattice with multihollow structure

作     者：Kai-Tong Wang Fuming Xu Bin Wang Yunjin Yu Yadong Wei Kai-Tong Wang;Fuming Xu;Bin Wang;Yunjin Yu;Yadong Wei

作者机构：School of Physics and EngineeringHenan University of Science and TechnologyLuoyang 471023China College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China 

出 版 物：《Frontiers of physics》 (物理学前沿（英文版）)

年 卷 期：2022年第17卷第4期

页      面：83-89页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12174262 and 11774238) the Natural Science Foundation of Guangdong(Grant No.2020A1515011418) the Natural Science Foundation of Shenzhen(Grant Nos.20200812092737002,JCYJ20190808150409413,JCYJ20190808115415679,and JCYJ20190808152801642) 

主　　题：second-order topological insulator Kane–Mele model global resonant state single-electron source 

摘      要：Higher-order topological phase in 2-dimensional(2D)systems is characterized by in-gap corner states,which are hard to detect and *** numerically investigate transport properties of topological corner states in 2D honeycomb lattice,where the second-order topological phase is induced by an in-plane Zeeman field in the conventional Kane–Mele *** engineering multihollow structures with appropriate boundaries in honeycomb lattice,multiple corner states emerge,which greatly increases the probability to observe them.A typical two-probe setup is built to study the transport features of a diamond-shaped system with multihollow *** results reveal the existence of global resonant states in bulk insulator,which corresponds to the resonant tunneling of multiple corner states and occupies the entire scattering ***,based on the well separated energy levels of multiple corner states,a single-electron source is constructed.