Band topologies of hexaborides CaB6 and EuB6

作     者：Zhi Li Shu-Yu Ning HaiBin Su Toshiaki Iitaka XinYu Yang Jiu-Xing Zhang Tohyama Takami 

作者机构：School of Materials Science and Engineering Hefei University of Technology Hefei 230009 China Division of Materials Science Nanyang Technological University Singapore 639798 Singapore Institute of Advanced Studies Nanyang Technological University Singapore 639673 Singapore Computational Astrophysics Laboratory RIKEN Saitama 351-0198 Japan Department of Applied Physics Tokyo University of Science Tokyo 125-8585 Japan 

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：2017年第60卷第1期

页      面：76-79页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11604068,and 51371010) the Fundamental Research Funds for the Central Universities 

主　　题：Ca Eu Band topologies of hexaborides CaB6 and EuB6 Figure down than 

摘      要：In last decades, topological materials [1-3] have attracted lots of research interest. Topological Kondo insulator （TKI） [4], as an exotic quantum state, has been proposed theoretically in two hexaborides StuB6 and YbB6, in which there is a d/f（p） band inversion at momentum point X [5]. There are lots of experimental work supporting the TKI state and metallic sur- face state in typical Kondo insulator SmB6 [6-10]. However, more and more experimental results demonstrated that YbB6 is trivial insulator at ambient pressure [11]. Under high pres- sure, the band gap of YbB6 will close and the dip band inver- sion can happen under pressure about 15 GPa [12].