| Magic angles and flat Chern bands in alternating-twist multilayer graphene system | |
| Liu, Zhiyong1,2; Shi, Wenyuan3; Yang, Teng1,2; Zhang, Zhidong1,2 | |
| Corresponding Author | Yang, Teng(yangteng@imr.ac.cn) |
| 2022-06-01 | |
| Source Publication | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| ISSN | 1005-0302 |
| Volume | 111Pages:28-34 |
| Abstract | Based on the effective continuum model, we study alternating-twist multilayer graphene system and emergence of magic angles and flat band topology. All the alternating-twist multilayer graphene system (from triple layers to few layers) are found to have flat bands at magic angles where the area of AA stacking equals n-fold ( n is an integer) electron cyclotron area. From the pseudo-Landau-level representation, there is always an isolated Dirac band in the alternating-twist graphene system constructed by odd number of layers. Since each pair of flat bands can be perceived as the zeroth pseudo-Landau-levels in two dimensional Dirac fermions, electron in the flat band pair can feel a pseudo-magnetic field with the same magnitude but the opposite sign. Calculated Chern number for each flat band is + 1 (or-1) which can be tuned by twisting in the vicinity of magic angles or by gating. The concurrent appearance of strong correlation and band topology of flat bands in the alternating-twist multilayer graphene may pave an avenue for the new understanding of superconductivity observed in triple-layered graphene, and supply a new playground for realizing (quantum) anomalous Hall effect. (c) 2021 Published by Elsevier Ltd on behalf of Chinese Society for Metals. |
| Keyword | Alternating-twist multilayer graphene Magic angle Flat band Band topology |
| Funding Organization | National Natural Science Foundation of China ; Ministry of Sci-ence and Technology of China ; Liaoning Provincial Natural Science Fund |
| DOI | 10.1016/j.jmst.2021.09.040 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[52031014] ; Ministry of Sci-ence and Technology of China[2017YFA0206301] ; Liaoning Provincial Natural Science Fund[2021-MS-006] |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000788132900004 |
| Publisher | JOURNAL MATER SCI TECHNOL |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/172636 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Yang, Teng |
| Affiliation | 1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Western Reserve Acad, 115 Coll St, Hudson, OH 44236 USA |
| Recommended Citation GB/T 7714 | Liu, Zhiyong,Shi, Wenyuan,Yang, Teng,et al. Magic angles and flat Chern bands in alternating-twist multilayer graphene system[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2022,111:28-34. |
| APA | Liu, Zhiyong,Shi, Wenyuan,Yang, Teng,&Zhang, Zhidong.(2022).Magic angles and flat Chern bands in alternating-twist multilayer graphene system.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,111,28-34. |
| MLA | Liu, Zhiyong,et al."Magic angles and flat Chern bands in alternating-twist multilayer graphene system".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 111(2022):28-34. |
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