Magic angles and flat Chern bands in alternating-twist multilayer graphene system

doi:10.1016/j.jmst.2021.09.040

IMR OpenIR

	Magic angles and flat Chern bands in alternating-twist multilayer graphene system
	Liu, Zhiyong 1,2; Shi, Wenyuan 3; Yang, Teng 1,2; Zhang, Zhidong 1,2
通讯作者	Yang, Teng(yangteng@imr.ac.cn)
	2022-06-01
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	111 页码:28-34
摘要	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.
关键词	Alternating-twist multilayer graphene Magic angle Flat band Band topology
资助者	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
收录类别	SCI
语种	英语
资助项目	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研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000788132900004
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/172636
专题	中国科学院金属研究所
通讯作者	Yang, Teng
作者单位	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
推荐引用方式 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.