Emergence of quantum confinement in topological kagome superconductor CsV3Sb5

doi:10.1038/s43246-024-00461-z

	Emergence of quantum confinement in topological kagome superconductor CsV3Sb5
	Cai, Yongqing 1,2; Wang, Yuan 1; Hao, Zhanyang 1; Liu, Yixuan 1; Sui, Xuelei 3,4; Liang, Zuowei 5; Ma, Xiao-Ming 1; Zhang, Fayuan 1; Shen, Zecheng 1; Zhang, Chengcheng 1; Jiang, Zhicheng 6,7; Yang, Yichen 6,7; Liu, Wanling 6,7; Jiang, Qi 6,7; Liu, Zhengtai 6,7; Ye, Mao 6,7; Shen, Dawei 6,7; Gao, Han8 ; Xiao, Hanbo8 ; Liu, Zhongkai8 ; Sun, Zhe 9; Liu, Yi 9; Cui, Shengtao 9; Chen, Jiabin 4; Wang, Le 1; Liu, Cai 1; Lin, Junhao 1; Huang, Bing 4; Wang, Zhenyu 5; Chen, Xianhui 5; Mei, Jia-Wei 1; Wang, Jianfeng 4,10; Chen, Chaoyu 1,11
	2024-12
发表期刊	COMMUNICATIONS MATERIALS (IF:7.5[JCR-2023],7.9[5-Year])
EISSN	2662-4443
卷号	5 期号:1
DOI	10.1038/s43246-024-00461-z
摘要	Quantum confinement is a restriction on the motion of electrons in a material to specific region, resulting in discrete energy levels rather than continuous energy bands. In certain materials, quantum confinement could dramatically reshape the electronic structure and properties of the surface with respect to the bulk. Here, in the recently discovered kagome superconductors CsV3Sb5, we unveil the dominant role of quantum confinement in determining their surface electronic structure. Combining angle-resolved photoemission spectroscopy (ARPES) measurement and density-functional theory simulation, we report the observations of two-dimensional quantum well states due to the confinement of bulk electron pocket and Dirac cone to the nearly isolated surface layer. The theoretical calculations on the slab model also suggest that the ARPES observed spectra are almost entirely contributed by the top two layers. Our results not only explain the disagreement of band structures between the recent experiments and calculations, but also suggest an equally important role played by quantum confinement, together with strong correlation and band topology, in shaping the electronic properties of this material. © The Author(s) 2024.
关键词	Band structure Density functional theory Electronic structure Photoelectron spectroscopy Quantum confinement Semiconductor quantum wells Superconducting materials Topology Angle resolved photoemission spectroscopy Continuous energy Density functional theory simulations Discrete energy levels Electronic.structure Motion of electrons Spectroscopy measurements Structures and properties Surface electronic structures Two-dimensional
URL	查看原文
收录类别	EI
语种	英语
出版者	Springer Nature
EI入藏号	20241215757407
EI主题词	Electronic properties
EI分类号	708.3 Superconducting Materials ; 714.2 Semiconductor Devices and Integrated Circuits ; 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory ; 922.1 Probability Theory ; 931.3 Atomic and Molecular Physics ; 931.4 Quantum Theory ; Quantum Mechanics ; 933 Solid State Physics
原始文献类型	Journal article (JA)
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/359922
专题	物质科学与技术学院物质科学与技术学院_PI研究组_柳仲楷组物质科学与技术学院_本科生物质科学与技术学院_博士生
通讯作者	Mei, Jia-Wei; Wang, Jianfeng; Chen, Chaoyu
作者单位	1.Shenzhen Institute for Quantum Science and Engineering (SIQSE) and Department of Physics, Southern University of Science and Technology (SUSTech), Shenzhen; 518055, China; 2.School of Physics, Dalian University of Technology, Dalian; 116024, China; 3.College of Mathematics and Physics, Beijing University of Chemical Technology, Beijing; 100029, China; 4.Beijing Computational Science Research Center, Beijing; 100193, China; 5.Department of Physics and Chinese Academy of Sciences Key laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China, Anhui, Hefei; 230026, China; 6.Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai; 201204, China; 7.Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai; 200050, China; 8.School of Physical Science and Technology, ShanghaiTech University, Shanghai; 201210, China; 9.National Synchrotron Radiation Laboratory, University of Science and Technology of China, Anhui, Hefei; 230029, China; 10.School of Physics, Beihang University, Beijing; 100191, China; 11.Institute of Advanced Science Facilities, Shenzhen; 518107, China
推荐引用方式 GB/T 7714	Cai, Yongqing,Wang, Yuan,Hao, Zhanyang,et al. Emergence of quantum confinement in topological kagome superconductor CsV3Sb5[J]. COMMUNICATIONS MATERIALS,2024,5(1).
APA	Cai, Yongqing.,Wang, Yuan.,Hao, Zhanyang.,Liu, Yixuan.,Sui, Xuelei.,...&Chen, Chaoyu.(2024).Emergence of quantum confinement in topological kagome superconductor CsV3Sb5.COMMUNICATIONS MATERIALS,5(1).
MLA	Cai, Yongqing,et al."Emergence of quantum confinement in topological kagome superconductor CsV3Sb5".COMMUNICATIONS MATERIALS 5.1(2024).