Rich nature of Van Hove singularities in Kagome superconductor CsV3Sb5
文献类型：期刊论文
| 作者 | Hu, Yong; Wu, Xianxin6; Ortiz, Brenden R.; Ju, Sailong; Han, Xinloong9,10,11; Ma, Junzhang12,13,14; Plumb, Nicholas C.; Radovic, Milan; Thomale, Ronny1,2,3; Wilson, Stephen D. |
| 刊名 | NATURE COMMUNICATIONS
 |
| 出版日期 | 2022 |
| 卷号 | 13期号:1页码:2220 |
| 关键词 | LIQUID GROUND-STATE CHARGE-DENSITY-WAVE MECHANISM PHASE |
| DOI | 10.1038/s41467-022-29828-x |
| 英文摘要 | Predictions suggest enhanced correlation effect due to multiple van Hove singularities (VHS) in the vicinity of the Fermi level in the recently discovered AV(3)Sb(5) kagome metals. Here the authors identify three VHSs close to the Fermi level with diverse sublattice characters in CsV3Sb5, and one of them shows flat dispersion suggesting the higher-order nature. The recently discovered layered kagome metals AV(3)Sb(5) (A = K, Rb, Cs) exhibit diverse correlated phenomena, which are intertwined with a topological electronic structure with multiple van Hove singularities (VHSs) in the vicinity of the Fermi level. As the VHSs with their large density of states enhance correlation effects, it is of crucial importance to determine their nature and properties. Here, we combine polarization-dependent angle-resolved photoemission spectroscopy with density functional theory to directly reveal the sublattice properties of 3d-orbital VHSs in CsV3Sb5. Four VHSs are identified around the M point and three of them are close to the Fermi level, with two having sublattice-pure and one sublattice-mixed nature. Remarkably, the VHS just below the Fermi level displays an extremely flat dispersion along MK, establishing the experimental discovery of higher-order VHS. The characteristic intensity modulation of Dirac cones around K further demonstrates the sublattice interference embedded in the kagome Fermiology. The crucial insights into the electronic structure, revealed by our work, provide a solid starting point for the understanding of the intriguing correlation phenomena in the kagome metals AV(3)Sb(5). |
| 学科主题 | Science & Technology - Other Topics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/27846]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 作者单位 | 1.City Univ Hong Kong, Hong Kong Inst Adv Study, Kowloon, Hong Kong, Peoples R China 2.Univ Wurzburg, Inst Theoret Phys, D-97074 Wurzburg, Germany 3.Indian Inst Technol Madras, Dept Phys, Chennai 600036, Tamil Nadu, India 4.Indian Inst Technol Madras, Quantum Ctr Diamond & Emerging Mat QuCenDiEM Grp, Chennai 600036, Tamil Nadu, India 5.Paul Scherrer Inst, Photon Sci Div, CH-5232 Villigen, Switzerland 6.Hu, Yong; Wu, Xianxin; Schnyder, Andreas P.] Max Planck Inst Festkorperforsch, Heisenbergstr 1, D-70569 Stuttgart, Germany 7.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 8.Ortiz, Brenden R.; Wilson, Stephen D.] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA 9.Ortiz, Brenden R.; Wilson, Stephen D.] Univ Calif Santa Barbara, Calif Nanosyst Inst, Santa Barbara, CA 93106 USA 10.Univ Hong Kong, Dept Phys, Hong Kong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Yong,Wu, Xianxin,Ortiz, Brenden R.,et al. Rich nature of Van Hove singularities in Kagome superconductor CsV3Sb5[J]. NATURE COMMUNICATIONS,2022,13(1):2220. |
| APA | Hu, Yong.,Wu, Xianxin.,Ortiz, Brenden R..,Ju, Sailong.,Han, Xinloong.,...&Shi, Ming.(2022).Rich nature of Van Hove singularities in Kagome superconductor CsV3Sb5.NATURE COMMUNICATIONS,13(1),2220. |
| MLA | Hu, Yong,et al."Rich nature of Van Hove singularities in Kagome superconductor CsV3Sb5".NATURE COMMUNICATIONS 13.1(2022):2220. |
入库方式： OAI收割
来源：理论物理研究所
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