Photoemission Spectroscopic Evidence of Multiple Dirac Cones in Superconducting BaSn_(3)

作     者：Zhe Huang Xianbiao Shi Gaoning Zhang Zhengtai Liu Soohyun Cho Zhicheng Jiang Zhonghao Liu Jishan Liu Yichen Yang Wei Xia Weiwei Zhao Yanfeng Guo Dawei Shen 黄喆;石贤彪;张高宁;刘正太;Soohyun Cho;江志诚;刘中灏;刘吉山;杨逸尘;夏威;赵维巍;郭艳峰;沈大伟

作者机构：Center for Excellence in Superconducting ElectronicsState Key Laboratory of Functional Materials for InformaticsShanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China School of Physical Science and TechnologyShanghai Tech UniversityUniversityShanghai 201210 State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyShenzhen 518055China Flexible Printed Electronics Technology CenterHarbin Institute of TechnologyShenzhen 518055China Shanghai Tech Laboratory for Topological PhysicsShanghai Tech UniversityShanghai 201210China 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2021年第38卷第10期

页      面：43-48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] 

基　　金：Supported by the National Key R&D Program of China (Grant No. 2016YFA0300204) the National Natural Science Foundation of China (Grant Nos. U2032208 and 11874264) the Natural Science Foundation of Shanghai (Grant No. 14ZR1447600) the starting grant of Shanghai Tech University and the Program for Professor of Special Appointment (Shanghai Eastern Scholar) supported by ME~2 project (Grant No. 11227902) from the National Natural Science Foundation of China supported by the National Natural Science Foundation of China (Grant No. 11974395) the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB33000000) the Center for Materials Genome the support from Analytical Instrumentation Center,SPST,Shanghai Tech University (Grant No. SPST-AIC10112914) 

主　　题：material topological Dirac 

摘      要：Signatures of topological superconductivity(TSC)in superconducting materials with topological nontrivial states prompt intensive researches *** high-resolution angle-resolved photoemission spectroscopy and first-principles calculations,we demonstrate multiple Dirac fermions and surface states in superconductor BaSn_(3) with a critical transition temperature of about 4.4 *** predict and then unveil the existence of two pairs of type-Ⅰtopological Dirac fermions residing on the rotational ***-ⅡDirac fermions protected by screw axis are confirmed in the same *** calculation for the spin helical texture of the observed surface states originating from the Dirac fermions gives an opportunity for realization of TSC in one single *** multiple Dirac fermions and topological surface states,the intrinsic superconductor BaSn_(3) is expected to be a new platform for further investigation of topological quantum materials as well as TSC.