Discovery of higher-order topological insulators using the spin Hall conductivity as a topology signature

作     者：Marcio Costa Gabriel R.Schleder Carlos Mera Acosta Antonio C.M.Padilha Frank Cerasoli Marco Buongiorno Nardelli Adalberto Fazzio 

作者机构：Department of PhysicsFluminense Federal UniversityNiteróiRio de JaneiroBrazil Brazilian Nanotechnology National Laboratory(LNNano)CNPEMCampinasBrazil Center for Natural and Human SciencesFederal University of ABCSanto AndréSPBrazil Department of Physics and Department of ChemistryUniversity of North TexasDentonTXUSA 

出 版 物：《npj Computational Materials》 (计算材料学（英文）)

年 卷 期：2021年第7卷第1期

页      面：457-462页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0701[理学-数学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：M.C. G.R.S. C.M.A. A.C.M.P. and A.F.acknowledges financial support from the Fundação de AmparoàPesquisa do Estado de São Paulo(FAPESP) project numbers 16/14011-2 17/18139-6 18/11856-7 18/05565-0 17/02317-2 

主　　题：topological insulator conductivity 

摘      要：The discovery and realization of topological insulators,a phase of matter which hosts metallic boundary states when the ddimension insulating bulk is confined to(d−1)-dimensions,led to several potential ***,it was shown that protected topological states can manifest in(d−2)-dimensions,such as hinge and corner states for three-and two-dimensional systems,*** nontrivial materials are named higher-order topological insulators(HOTIs).Here we show a connection between spin Hall effect and HOTIs using a combination of ab initio calculations and tight-binding *** model demonstrates how a non-zero bulk midgap spin Hall conductivity(SHC)emerges within the HOTI *** this,we performed high-throughput density functional theory calculations to find unknown HOTIs,using the SHC as a *** calculated the SHC of 693 insulators resulting in seven stable two-dimensional *** work guides novel experimental and theoretical advances towards higher-order topological insulator realization and applications.