典型文献
Magic angles and flat Chern bands in alternating-twist multilayer graphene system
文献摘要：
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 sys-tem(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 represen-tation,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.
文献关键词：
中图分类号：
作者姓名：
Zhiyong Liu;Wenyuan Shi;Teng Yang;Zhidong Zhang
作者机构：
Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China;Western Reserve Academy,115 College Street Hudson,Ohio 44236,United States
文献出处：
引用格式：
[1]Zhiyong Liu;Wenyuan Shi;Teng Yang;Zhidong Zhang-.Magic angles and flat Chern bands in alternating-twist multilayer graphene system)[J].材料科学技术（英文版）,2022(16):28-34
A类：
is+1
B类：
Magic,angles,flat,Chern,bands,alternating,multilayer,graphene,system,Based,effective,continuum,model,we,study,emergence,magic,topology,All,from,triple,layers,few,found,have,where,area,AA,stacking,equals,fold,integer,electron,cyclotron,From,pseudo,Landau,represen,tation,there,always,isolated,Dirac,constructed,by,odd,number,Since,each,pair,can,perceived,zeroth,levels,two,dimensional,fermions,feel,magnetic,field,same,magnitude,but,opposite,sign,Calculated,which,tuned,twisting,vicinity,gating,concurrent,appearance,strong,correlation,may,pave,avenue,new,understanding,superconductivity,observed,layered,supply,playground,realizing,quantum,anomalous,Hall
AB值：
0.505519
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