Novel electrical properties of moiré graphene systems

doi:10.7498/aps.72.20230120

	Novel electrical properties of moiré graphene systems
	Zhang, Shi-Hao1 ; Xie, Bo1 ; Peng, Ran1 ; Liu, Xiao-Qian1 ; Lü, Xin1 ; Liu, Jian-Peng1,2
	2023-03-20
发表期刊	WULI XUEBAO/ACTA PHYSICA SINICA
ISSN	1000-3290
卷号	72 期号:6
DOI	10.7498/aps.72.20230120
摘要	In this review, we discuss the electronic structures, topological properties, correlated states, nonlinear optical responses, as well as phonon and electron-phonon coupling effects of moiré graphene superlattices. First, we illustrate that topologically non-trivial flat bands and moiré orbital magnetism are ubiquitous in various twisted graphene systems. In particular, the topological flat bands of magic-angle twisted bilayer graphene can be explained from a zeroth pseudo-Landau-level picture, which can naturally explain the experimentally observed quantum anomalous Hall effect and some of the other correlated states. These topologically nontrivial flat bands may lead to nearly quantized piezoelectric response, which can be used to directly probe the valley Chern numbers in these moiré graphene systems. A simple and general chiral decomposition rule is reviewed and discussed, which can be used to predict the low-energy band dispersions of generic twisted multilayer graphene system and alternating twisted multilayer graphene system. This review further discusses nontrivial interaction effects of magic-angle TBG such as the correlated insulator states, density wave states, cascade transitions, and nematic states, and proposes nonlinear optical measurement as an experimental probe to distinguish the different "featureless" correlated states. The phonon properties and electron-phonon coupling effects are also briefly reviewed. The novel physics emerging from band-aligned graphene-insulator heterostructres is also discussed in this review. In the end, we make a summary and an outlook about the novel physical properties of moiré superlattices based on two-dimensional materials. © 2023 Chinese Physical Society.
关键词	Electron-phonon interactions Electronic structure Electrons Multilayers Nonlinear optics Optical data processing Piezoelectricity Probes Quantum Hall effect Quantum theory Topology Correlated state Electron-phonon coupling effects Electronic.structure Flat band Magic angle Moire graphene heterostructure Moire phonons Multilayer graphene Nonlinear optical effects Topological physic
URL	查看原文
收录类别	EI ; 北大核心
语种	中文
出版者	Institute of Physics, Chinese Academy of Sciences
EI入藏号	20231413833548
EI主题词	Graphene
EI分类号	701.1 Electricity: Basic Concepts and Phenomena ; 723.2 Data Processing and Image Processing ; 741.1.1 Nonlinear Optics ; 761 Nanotechnology ; 804 Chemical Products Generally ; 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory ; 931 Classical Physics ; Quantum Theory ; Relativity ; 931.3 Atomic and Molecular Physics ; 931.4 Quantum Theory ; Quantum Mechanics ; 933 Solid State Physics
原始文献类型	Journal article (JA)
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/290036
专题	物质科学与技术学院物质科学与技术学院_硕士生物质科学与技术学院_本科生物质科学与技术学院_博士生物质科学与技术学院_PI研究组_刘健鹏组
通讯作者	Liu, Jian-Peng
作者单位	1.School of Physical Science and Technology, ShanghaiTech University, Shanghai; 201210, China; 2.Laboratory for Topological Physics, ShanghaiTech University, Shanghai; 201210, China
第一作者单位	物质科学与技术学院
通讯作者单位	物质科学与技术学院; 上海科技大学
第一作者的第一单位	物质科学与技术学院
推荐引用方式 GB/T 7714	Zhang, Shi-Hao,Xie, Bo,Peng, Ran,et al. Novel electrical properties of moiré graphene systems[J]. WULI XUEBAO/ACTA PHYSICA SINICA,2023,72(6).
APA	Zhang, Shi-Hao,Xie, Bo,Peng, Ran,Liu, Xiao-Qian,Lü, Xin,&Liu, Jian-Peng.(2023).Novel electrical properties of moiré graphene systems.WULI XUEBAO/ACTA PHYSICA SINICA,72(6).
MLA	Zhang, Shi-Hao,et al."Novel electrical properties of moiré graphene systems".WULI XUEBAO/ACTA PHYSICA SINICA 72.6(2023).