Flat bands and distinct density wave orders in correlated Kagome superconductor CsCr$_3$Sb$_5$
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866910056581169152 |
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| author | Peng, Shuting Han, Yulei Li, Yongkai Shen, Jianchang Miao, Yu Luo, Yang Huai, Linwei Ou, Zhipeng Li, Hongyu Xiang, Ziji Liu, Zhengtai Shen, Dawei Hashimoto, Makoto Lu, Donghui Yao, Yugui Qiao, Zhenhua Wang, Zhiwei He, Junfeng |
| author_facet | Peng, Shuting Han, Yulei Li, Yongkai Shen, Jianchang Miao, Yu Luo, Yang Huai, Linwei Ou, Zhipeng Li, Hongyu Xiang, Ziji Liu, Zhengtai Shen, Dawei Hashimoto, Makoto Lu, Donghui Yao, Yugui Qiao, Zhenhua Wang, Zhiwei He, Junfeng |
| contents | Kagome metal CsV$_3$Sb$_5$ has attracted much recent attention due to the coexistence of multiple exotic orders and the associated proposals to mimic unconventional high temperature superconductors. Nevertheless, magnetism and strong electronic correlations -- two essential ingredients for unconventional superconductivity, are absent in this V-based Kagome metal. CsCr$_3$Sb$_5$ is a newly discovered Cr-based parallel of CsV$_3$Sb$_5$, in which magnetism appears with charge density wave and superconductivity at different temperature and pressure regions. Enhanced electronic correlations are also suggested by theoretical proposals due to the calculated flat bands. Here, we report angle-resolved photoemission measurements and first-principles calculations on this new material system. Electron energy bands and the associated orbitals are resolved. Flat bands are observed near the Fermi level. Doping dependent measurements on Cs(Cr$_x$V$_{1-x}$)$_3$Sb$_5$ reveal a gradually enhanced band renormalization from CsV$_3$Sb$_5$ to CsCr$_3$Sb$_5$, accompanied by distinct spatial symmetry breaking states in the phase diagram. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_17769 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Flat bands and distinct density wave orders in correlated Kagome superconductor CsCr$_3$Sb$_5$ Peng, Shuting Han, Yulei Li, Yongkai Shen, Jianchang Miao, Yu Luo, Yang Huai, Linwei Ou, Zhipeng Li, Hongyu Xiang, Ziji Liu, Zhengtai Shen, Dawei Hashimoto, Makoto Lu, Donghui Yao, Yugui Qiao, Zhenhua Wang, Zhiwei He, Junfeng Superconductivity Strongly Correlated Electrons Kagome metal CsV$_3$Sb$_5$ has attracted much recent attention due to the coexistence of multiple exotic orders and the associated proposals to mimic unconventional high temperature superconductors. Nevertheless, magnetism and strong electronic correlations -- two essential ingredients for unconventional superconductivity, are absent in this V-based Kagome metal. CsCr$_3$Sb$_5$ is a newly discovered Cr-based parallel of CsV$_3$Sb$_5$, in which magnetism appears with charge density wave and superconductivity at different temperature and pressure regions. Enhanced electronic correlations are also suggested by theoretical proposals due to the calculated flat bands. Here, we report angle-resolved photoemission measurements and first-principles calculations on this new material system. Electron energy bands and the associated orbitals are resolved. Flat bands are observed near the Fermi level. Doping dependent measurements on Cs(Cr$_x$V$_{1-x}$)$_3$Sb$_5$ reveal a gradually enhanced band renormalization from CsV$_3$Sb$_5$ to CsCr$_3$Sb$_5$, accompanied by distinct spatial symmetry breaking states in the phase diagram. |
| title | Flat bands and distinct density wave orders in correlated Kagome superconductor CsCr$_3$Sb$_5$ |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2406.17769 |