Photoemission Spectroscopic Evidence of Multiple Dirac Cones in Superconducting BaSn3
2021-11
发表期刊CHINESE PHYSICS LETTERS (IF:3.5[JCR-2023],2.1[5-Year])
ISSN0256-307X
EISSN1741-3540
卷号38期号:10
发表状态已发表
DOI10.1088/0256-307X/38/10/107403
摘要

Signatures of topological superconductivity (TSC) in superconducting materials with topological nontrivial states prompt intensive researches recently. Utilizing high-resolution angle-resolved photoemission spectroscopy and first-principles calculations, we demonstrate multiple Dirac fermions and surface states in superconductor BaSn3 with a critical transition temperature of about 4.4 K. We predict and then unveil the existence of two pairs of type-I topological Dirac fermions residing on the rotational axis. Type-II Dirac fermions protected by screw axis are confirmed in the same compound. Further 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 material. Hosting multiple Dirac fermions and topological surface states, the intrinsic superconductor BaSn3 is expected to be a new platform for further investigation of topological quantum materials as well as TSC.

收录类别SCIE ; EI
语种英语
WOS研究方向Physics
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000717792200001
出版者IOP Publishing Ltd
原始文献类型Article
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文献类型期刊论文
条目标识符https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/133162
专题物质科学与技术学院_公共科研平台_拓扑物理实验室
物质科学与技术学院_PI研究组_郭艳峰组
物质科学与技术学院_硕士生
物质科学与技术学院_博士生
通讯作者Liu, Jishan; Guo, Yanfeng; Shen, Dawei
作者单位
1.Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Funct Mat Informat, Ctr Excellence Supercond Elect, Shanghai 200050, Peoples R China;
2.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China;
3.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China;
4.Harbin Inst Technol, State Key Lab Adv Welding & Joining, Shenzhen 518055, Peoples R China;
5.Harbin Inst Technol, Flexible Printed Elect Technol Ctr, Shenzhen 518055, Peoples R China;
6.ShanghaiTech Univ, ShanghaiTech Lab Topol Phys, Shanghai 201210, Peoples R China
第一作者单位物质科学与技术学院
通讯作者单位物质科学与技术学院
推荐引用方式
GB/T 7714
Huang, Zhe,Shi, Xianbiao,Zhang, Gaoning,et al. Photoemission Spectroscopic Evidence of Multiple Dirac Cones in Superconducting BaSn3[J]. CHINESE PHYSICS LETTERS,2021,38(10).
APA Huang, Zhe.,Shi, Xianbiao.,Zhang, Gaoning.,Liu, Zhengtai.,Cho, Soohyun.,...&Shen, Dawei.(2021).Photoemission Spectroscopic Evidence of Multiple Dirac Cones in Superconducting BaSn3.CHINESE PHYSICS LETTERS,38(10).
MLA Huang, Zhe,et al."Photoemission Spectroscopic Evidence of Multiple Dirac Cones in Superconducting BaSn3".CHINESE PHYSICS LETTERS 38.10(2021).
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