Spin Excitations and Flat Electronic Bands in a Cr-based Kagome Superconductor
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
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2024
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| author | Wang, Zehao Guo, Yucheng Huang, Hsiao Yu Xie, Fang Huang, Yuefei Gao, Bin Oh, Ji Seop Wu, Han Okamoto, Jun Channagowdra, Ganesha Chen, Chien Te Ye, Feng Lu, Xingye Liu, Zhaoyu Ren, Zheng Fang, Yuan Wang, Yiming Biswas, Ananya Zhang, Yichen Yue, Ziqin Hu, Cheng Jozwiak, Chris Bostwick, Aaron Rotenberg, Eli Hashimoto, Makoto Lu, Donghui Kono, Junichiro Chu, Jiun Haw Yakobson, Boris I Birgeneau, Robert J Cao, Guang Han Fujimori, Atsushi Huang, Di Jing Si, Qimiao Yi, Ming Dai, Pengcheng |
| author_facet | Wang, Zehao Guo, Yucheng Huang, Hsiao Yu Xie, Fang Huang, Yuefei Gao, Bin Oh, Ji Seop Wu, Han Okamoto, Jun Channagowdra, Ganesha Chen, Chien Te Ye, Feng Lu, Xingye Liu, Zhaoyu Ren, Zheng Fang, Yuan Wang, Yiming Biswas, Ananya Zhang, Yichen Yue, Ziqin Hu, Cheng Jozwiak, Chris Bostwick, Aaron Rotenberg, Eli Hashimoto, Makoto Lu, Donghui Kono, Junichiro Chu, Jiun Haw Yakobson, Boris I Birgeneau, Robert J Cao, Guang Han Fujimori, Atsushi Huang, Di Jing Si, Qimiao Yi, Ming Dai, Pengcheng |
| contents | In the quest for topology- and correlation-driven quantum states, kagome lattice materials have garnered significant interest for their band structures, featuring flat bands (FBs) from the quantum destructive interference of the electronic wavefunction. Tuning an FB to the chemical potential could induce electronic instabilities and emergent orders. Despite extensive studies, direct evidence of FBs tuned to the chemical potential and their role in emergent orders in bulk materials remains lacking. Using angle-resolved photoemission spectroscopy, resonant inelastic X-ray scattering, and density functional theory, we show that the low-energy structure of the Cr-based kagome metal superconductor {\Cr} is dominated by FBs at the Fermi level. We also observe low-energy magnetic excitations evolving across the low-temperature transition, largely consistent with the FB shift. Our results suggest that the low-temperature order contains a magnetic origin and that the kagome FBs may play a role in the emergence of this order. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_05293 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Spin Excitations and Flat Electronic Bands in a Cr-based Kagome Superconductor Wang, Zehao Guo, Yucheng Huang, Hsiao Yu Xie, Fang Huang, Yuefei Gao, Bin Oh, Ji Seop Wu, Han Okamoto, Jun Channagowdra, Ganesha Chen, Chien Te Ye, Feng Lu, Xingye Liu, Zhaoyu Ren, Zheng Fang, Yuan Wang, Yiming Biswas, Ananya Zhang, Yichen Yue, Ziqin Hu, Cheng Jozwiak, Chris Bostwick, Aaron Rotenberg, Eli Hashimoto, Makoto Lu, Donghui Kono, Junichiro Chu, Jiun Haw Yakobson, Boris I Birgeneau, Robert J Cao, Guang Han Fujimori, Atsushi Huang, Di Jing Si, Qimiao Yi, Ming Dai, Pengcheng Strongly Correlated Electrons In the quest for topology- and correlation-driven quantum states, kagome lattice materials have garnered significant interest for their band structures, featuring flat bands (FBs) from the quantum destructive interference of the electronic wavefunction. Tuning an FB to the chemical potential could induce electronic instabilities and emergent orders. Despite extensive studies, direct evidence of FBs tuned to the chemical potential and their role in emergent orders in bulk materials remains lacking. Using angle-resolved photoemission spectroscopy, resonant inelastic X-ray scattering, and density functional theory, we show that the low-energy structure of the Cr-based kagome metal superconductor {\Cr} is dominated by FBs at the Fermi level. We also observe low-energy magnetic excitations evolving across the low-temperature transition, largely consistent with the FB shift. Our results suggest that the low-temperature order contains a magnetic origin and that the kagome FBs may play a role in the emergence of this order. |
| title | Spin Excitations and Flat Electronic Bands in a Cr-based Kagome Superconductor |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2406.05293 |