Emergence of quantum confinement in topological kagome superconductor CsV3Sb5
Abstract 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 surf...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-03-01
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| Series: | Communications Materials |
| Online Access: | https://doi.org/10.1038/s43246-024-00461-z |
| _version_ | 1827315805658808320 |
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| author | Yongqing Cai Yuan Wang Zhanyang Hao Yixuan Liu Xuelei Sui Zuowei Liang Xiao-Ming Ma Fayuan Zhang Zecheng Shen Chengcheng Zhang Zhicheng Jiang Yichen Yang Wanling Liu Qi Jiang Zhengtai Liu Mao Ye Dawei Shen Han Gao Hanbo Xiao Zhongkai Liu Zhe Sun Yi Liu Shengtao Cui Jiabin Chen Le Wang Cai Liu Junhao Lin Bing Huang Zhenyu Wang Xianhui Chen Jia-Wei Mei Jianfeng Wang Chaoyu Chen |
| author_facet | Yongqing Cai Yuan Wang Zhanyang Hao Yixuan Liu Xuelei Sui Zuowei Liang Xiao-Ming Ma Fayuan Zhang Zecheng Shen Chengcheng Zhang Zhicheng Jiang Yichen Yang Wanling Liu Qi Jiang Zhengtai Liu Mao Ye Dawei Shen Han Gao Hanbo Xiao Zhongkai Liu Zhe Sun Yi Liu Shengtao Cui Jiabin Chen Le Wang Cai Liu Junhao Lin Bing Huang Zhenyu Wang Xianhui Chen Jia-Wei Mei Jianfeng Wang Chaoyu Chen |
| author_sort | Yongqing Cai |
| collection | DOAJ |
| description | Abstract 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. |
| first_indexed | 2024-04-24T23:04:34Z |
| format | Article |
| id | doaj.art-3559949457ce4ce892f6a06cfe5dba6c |
| institution | Directory Open Access Journal |
| issn | 2662-4443 |
| language | English |
| last_indexed | 2024-04-24T23:04:34Z |
| publishDate | 2024-03-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Communications Materials |
| spelling | doaj.art-3559949457ce4ce892f6a06cfe5dba6c2024-03-17T12:32:58ZengNature PortfolioCommunications Materials2662-44432024-03-01511710.1038/s43246-024-00461-zEmergence of quantum confinement in topological kagome superconductor CsV3Sb5Yongqing Cai0Yuan Wang1Zhanyang Hao2Yixuan Liu3Xuelei Sui4Zuowei Liang5Xiao-Ming Ma6Fayuan Zhang7Zecheng Shen8Chengcheng Zhang9Zhicheng Jiang10Yichen Yang11Wanling Liu12Qi Jiang13Zhengtai Liu14Mao Ye15Dawei Shen16Han Gao17Hanbo Xiao18Zhongkai Liu19Zhe Sun20Yi Liu21Shengtao Cui22Jiabin Chen23Le Wang24Cai Liu25Junhao Lin26Bing Huang27Zhenyu Wang28Xianhui Chen29Jia-Wei Mei30Jianfeng Wang31Chaoyu Chen32Shenzhen Institute for Quantum Science and Engineering (SIQSE) and Department of Physics, Southern University of Science and Technology (SUSTech)Shenzhen Institute for Quantum Science and Engineering (SIQSE) and Department of Physics, Southern University of Science and Technology (SUSTech)Shenzhen Institute for Quantum Science and Engineering (SIQSE) and Department of Physics, Southern University of Science and Technology (SUSTech)Shenzhen Institute for Quantum Science and Engineering (SIQSE) and Department of Physics, Southern University of Science and Technology (SUSTech)College of Mathematics and Physics, Beijing University of Chemical TechnologyDepartment of Physics and Chinese Academy of Sciences Key laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of ChinaShenzhen Institute for Quantum Science and Engineering (SIQSE) and Department of Physics, Southern University of Science and Technology (SUSTech)Shenzhen Institute for Quantum Science and Engineering (SIQSE) and Department of Physics, Southern University of Science and Technology (SUSTech)Shenzhen Institute for Quantum Science and Engineering (SIQSE) and Department of Physics, Southern University of Science and Technology (SUSTech)Shenzhen Institute for Quantum Science and Engineering (SIQSE) and Department of Physics, Southern University of Science and Technology (SUSTech)Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of SciencesShanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of SciencesShanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of SciencesShanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of SciencesShanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of SciencesShanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of SciencesShanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of SciencesSchool of Physical Science and Technology, ShanghaiTech UniversitySchool of Physical Science and Technology, ShanghaiTech UniversitySchool of Physical Science and Technology, ShanghaiTech UniversityNational Synchrotron Radiation Laboratory, University of Science and Technology of ChinaNational Synchrotron Radiation Laboratory, University of Science and Technology of ChinaNational Synchrotron Radiation Laboratory, University of Science and Technology of ChinaBeijing Computational Science Research CenterShenzhen Institute for Quantum Science and Engineering (SIQSE) and Department of Physics, Southern University of Science and Technology (SUSTech)Shenzhen Institute for Quantum Science and Engineering (SIQSE) and Department of Physics, Southern University of Science and Technology (SUSTech)Shenzhen Institute for Quantum Science and Engineering (SIQSE) and Department of Physics, Southern University of Science and Technology (SUSTech)Beijing Computational Science Research CenterDepartment of Physics and Chinese Academy of Sciences Key laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of ChinaDepartment of Physics and Chinese Academy of Sciences Key laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of ChinaShenzhen Institute for Quantum Science and Engineering (SIQSE) and Department of Physics, Southern University of Science and Technology (SUSTech)Beijing Computational Science Research CenterShenzhen Institute for Quantum Science and Engineering (SIQSE) and Department of Physics, Southern University of Science and Technology (SUSTech)Abstract 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.https://doi.org/10.1038/s43246-024-00461-z |
| spellingShingle | Yongqing Cai Yuan Wang Zhanyang Hao Yixuan Liu Xuelei Sui Zuowei Liang Xiao-Ming Ma Fayuan Zhang Zecheng Shen Chengcheng Zhang Zhicheng Jiang Yichen Yang Wanling Liu Qi Jiang Zhengtai Liu Mao Ye Dawei Shen Han Gao Hanbo Xiao Zhongkai Liu Zhe Sun Yi Liu Shengtao Cui Jiabin Chen Le Wang Cai Liu Junhao Lin Bing Huang Zhenyu Wang Xianhui Chen Jia-Wei Mei Jianfeng Wang Chaoyu Chen Emergence of quantum confinement in topological kagome superconductor CsV3Sb5 Communications Materials |
| title | Emergence of quantum confinement in topological kagome superconductor CsV3Sb5 |
| title_full | Emergence of quantum confinement in topological kagome superconductor CsV3Sb5 |
| title_fullStr | Emergence of quantum confinement in topological kagome superconductor CsV3Sb5 |
| title_full_unstemmed | Emergence of quantum confinement in topological kagome superconductor CsV3Sb5 |
| title_short | Emergence of quantum confinement in topological kagome superconductor CsV3Sb5 |
| title_sort | emergence of quantum confinement in topological kagome superconductor csv3sb5 |
| url | https://doi.org/10.1038/s43246-024-00461-z |
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