Layer construction of topological crystalline insulator LaSbTe

作     者：YuTing Qian ZhiYun Tan Tan Zhang JiaCheng Gao ZhiJun Wang Zhong Fang Chen Fang HongMing Weng YuTing Qian;ZhiYun Tan;Tan Zhang;JiaCheng Gao;ZhiJun Wang;Zhong Fang;Chen Fang;HongMing Weng

作者机构：Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of SciencesBeijing 100049China School of Physics and Electronic ScienceZunyi Normal UniversityZunyi 563006China Songshan Lake Materials LaboratoryDongguan 523808China CAS Center for Excellence in Topological Quantum ComputationUniversity of Chinese Academy of SciencesBeijing 100190China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2020年第63卷第10期

页      面：91-97页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11504117,11674369,11925408,11921004,and11974395) the support from the Foundation of Guizhou Science and Technology Department(Grant No.QKHLHZ20177091) the support from the National Thousand-Young-Talents Program the CAS Pioneer Hundred Talents Program the National Natural Science Foundation of China the support from the National Key Research and Development Program of China(Grant Nos.2016YFA0300600,2016YFA0302400,and 2018YFA0305700) the K.C.Wong Education Foundation(Grant No.GJTD-2018-01) 

主　　题：layer construction topological crystalline insulator topological insulator LaSbTe 

摘      要：Topological crystalline insulator(TCI)is one of the symmetry-protected topological *** TCI can be deformed into a simple product state of several decoupled two-dimensional(2 D)topologically nontrivial layers in its lattice respecting its crystalline symmetries called the layer construction(LC)*** this work,based on first-principles calculations we have revealed that both tetragonal LaSbTe(t-LaSbTe)and orthorhombic LaSbTe(o-LaSbTe)can be interpreted as stacking of 2 D topological insulators in each lattice *** structural phase transition from t-LaSbTe to o-LaSbTe due to soft phonon modes demonstrates how the real space change can lead to the modification of topological *** symmetry-based indicators and topological invariants have been analyzed based on *** propose that LaSbTe is an ideal example demonstrating the LC paradigm,which bridges the crystal structures in real space to the band topology in momentum space.