van Hove Singularity-Driven Emergence of Multiple Flat Bands in Kagome Superconductors
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866915242191093760 |
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| author | Luo, Hailan Zhao, Lin Zhao, Zhen Yang, Haitao Huang, Yun-Peng Liu, Hongxiong Gu, Yuhao Jin, Feng Chen, Hao Miao, Taimin Yin, Chaohui Shen, Chengmin Ren, Xiaolin Liang, Bo Shu, Yingjie Chen, Yiwen Zhang, Fengfeng Yang, Feng Zhang, Shenjin Peng, Qinjun Mao, Hanqing Liu, Guodong Hu, Jiangping Shi, Youguo Xu, Zuyan Jiang, Kun Zhang, Qingming Wang, Ziqiang Gao, Hongjun Zhou, X. J. |
| author_facet | Luo, Hailan Zhao, Lin Zhao, Zhen Yang, Haitao Huang, Yun-Peng Liu, Hongxiong Gu, Yuhao Jin, Feng Chen, Hao Miao, Taimin Yin, Chaohui Shen, Chengmin Ren, Xiaolin Liang, Bo Shu, Yingjie Chen, Yiwen Zhang, Fengfeng Yang, Feng Zhang, Shenjin Peng, Qinjun Mao, Hanqing Liu, Guodong Hu, Jiangping Shi, Youguo Xu, Zuyan Jiang, Kun Zhang, Qingming Wang, Ziqiang Gao, Hongjun Zhou, X. J. |
| contents | The newly discovered Kagome superconductors AV$_3$Sb$_5$ (A=K, Rb and Cs) continue to bring surprises in generating unusual phenomena and physical properties, including anomalous Hall effect, unconventional charge density wave, electronic nematicity and time-reversal symmetry breaking. Here we report an unexpected emergence of multiple flat bands in the AV$_3$Sb$_5$ superconductors. By performing high-resolution angle-resolved photoemission (ARPES) measurements, we observed four branches of flat bands that span over the entire momentum space. The appearance of the flat bands is not anticipated from the band structure calculations and cannot be accounted for by the known mechanisms of flat band generation. It is intimately related to the evolution of van Hove singularities. It is for the first time to observe such emergence of multiple flat bands in solid materials. Our findings provide new insights in revealing the underlying mechanism that governs the unusual behaviors in the Kagome superconductors. They also provide a new pathway in producing flat bands and set a platform to study the flat bands related physics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_06085 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | van Hove Singularity-Driven Emergence of Multiple Flat Bands in Kagome Superconductors Luo, Hailan Zhao, Lin Zhao, Zhen Yang, Haitao Huang, Yun-Peng Liu, Hongxiong Gu, Yuhao Jin, Feng Chen, Hao Miao, Taimin Yin, Chaohui Shen, Chengmin Ren, Xiaolin Liang, Bo Shu, Yingjie Chen, Yiwen Zhang, Fengfeng Yang, Feng Zhang, Shenjin Peng, Qinjun Mao, Hanqing Liu, Guodong Hu, Jiangping Shi, Youguo Xu, Zuyan Jiang, Kun Zhang, Qingming Wang, Ziqiang Gao, Hongjun Zhou, X. J. Materials Science Strongly Correlated Electrons Superconductivity The newly discovered Kagome superconductors AV$_3$Sb$_5$ (A=K, Rb and Cs) continue to bring surprises in generating unusual phenomena and physical properties, including anomalous Hall effect, unconventional charge density wave, electronic nematicity and time-reversal symmetry breaking. Here we report an unexpected emergence of multiple flat bands in the AV$_3$Sb$_5$ superconductors. By performing high-resolution angle-resolved photoemission (ARPES) measurements, we observed four branches of flat bands that span over the entire momentum space. The appearance of the flat bands is not anticipated from the band structure calculations and cannot be accounted for by the known mechanisms of flat band generation. It is intimately related to the evolution of van Hove singularities. It is for the first time to observe such emergence of multiple flat bands in solid materials. Our findings provide new insights in revealing the underlying mechanism that governs the unusual behaviors in the Kagome superconductors. They also provide a new pathway in producing flat bands and set a platform to study the flat bands related physics. |
| title | van Hove Singularity-Driven Emergence of Multiple Flat Bands in Kagome Superconductors |
| topic | Materials Science Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2403.06085 |