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ShanghaiTech University Knowledge Management System
Orbital-selective Dirac fermions and extremely flat bands in frustrated kagome-lattice metal CoSn | |
2020-08-10 | |
发表期刊 | NATURE COMMUNICATIONS (IF:14.7[JCR-2023],16.1[5-Year]) |
ISSN | 2041-1723 |
卷号 | 11期号:1 |
发表状态 | 已发表 |
DOI | 10.1038/s41467-020-17462-4 |
摘要 | Layered kagome-lattice 3d transition metals are emerging as an exciting platform to explore the frustrated lattice geometry and quantum topology. However, the typical kagome electronic bands, characterized by sets of the Dirac-like band capped by a phase-destructive flat band, have not been clearly observed, and their orbital physics are even less well investigated. Here, we present close-to-textbook kagome bands with orbital differentiation physics in CoSn, which can be well described by a minimal tight-binding model with single-orbital hopping in Co kagome lattice. The capping flat bands with bandwidth less than 0.2eV run through the whole Brillouin zone, especially the bandwidth of the flat band of out-of-plane orbitals is less than 0.02eV along Gamma -M. The energy gap induced by spin-orbit interaction at the Dirac cone of out-of-plane orbitals is much smaller than that of in-plane orbitals, suggesting orbital-selective character of the Dirac fermions. The understanding of kagome bands, which are characterized by Dirac-like bands capped by a flat band, remains largely elusive. Here, Liu et al. report the observation of a flat band and Dirac bands as ideal features of kagome bands in CoSn, revealing orbital-selective character. |
URL | 查看原文 |
收录类别 | SCI ; SCIE |
语种 | 英语 |
资助项目 | National Key R&D Program of China[2016YFA0300204][2016YFA0300504][2016YFA0302300][2018YFE0202600][2016YFA0401000] ; National Natural Science Foundation of China[11704394][11774423][11774421][11822412][11674030][11574394][U1832102] ; Research Funds of Renmin University of China (RUC)[15XNLQ07][18XNLG14][19XNLG17] ; Science and Technology Commission of Shanghai Municipality (STCSM)[18QA1403100] ; U.S. Department of Energy, Basic Energy Sciences[DE- FG02-99ER45747] ; Ministry of Science and Technology of China[2016YFA0401002] ; NSFC[11227902] |
WOS研究方向 | Science & Technology - Other Topics |
WOS类目 | Multidisciplinary Sciences |
WOS记录号 | WOS:000561071600007 |
出版者 | NATURE PUBLISHING GROUP |
WOS关键词 | DYNAMICS |
原始文献类型 | Article |
引用统计 | 正在获取...
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文献类型 | 期刊论文 |
条目标识符 | https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/123080 |
专题 | 物质科学与技术学院_PI研究组_颜世超组 |
通讯作者 | Liu, Zhonghao; Yin, Zhiping; Lei, Hechang; Wang, Shancai |
作者单位 | 1.Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, Ctr Excellence Superconducting Elect, Shanghai 200050, Peoples R China 3.Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Beijing 100049, Peoples R China 4.Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China 5.Renmin Univ China, Beijing Key Lab Optoelect Funct Mat & Micronano D, Beijing 100872, Peoples R China 6.Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201204, Peoples R China 7.Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China 8.Beijing Normal Univ, Ctr Adv Quantum Studies, Beijing 100875, Peoples R China 9.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China 10.Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA 11.Princeton Univ, Dept Phys, Lab Topol Quantum Matter & Adv Spect B7, Princeton, NJ 08544 USA |
推荐引用方式 GB/T 7714 | Liu, Zhonghao,Li, Man,Wang, Qi,et al. Orbital-selective Dirac fermions and extremely flat bands in frustrated kagome-lattice metal CoSn[J]. NATURE COMMUNICATIONS,2020,11(1). |
APA | Liu, Zhonghao.,Li, Man.,Wang, Qi.,Wang, Guangwei.,Wen, Chenhaoping.,...&Wang, Shancai.(2020).Orbital-selective Dirac fermions and extremely flat bands in frustrated kagome-lattice metal CoSn.NATURE COMMUNICATIONS,11(1). |
MLA | Liu, Zhonghao,et al."Orbital-selective Dirac fermions and extremely flat bands in frustrated kagome-lattice metal CoSn".NATURE COMMUNICATIONS 11.1(2020). |
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