Twist-angle two-dimensional superlattices and their application in(opto)electronics  

作　　者：Kaiyao Xin Xingang Wang Kasper Grove-Rasmussen Zhongming Wei 

机构地区：[1]State Key Laboratory of Superlattices and Microstructures,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China [2]Center for Quantum Devices&Nano-Science Center,Niels Bohr Institute,University of Copenhagen,CopenhagenØ2100,Denmark [3]Sino-Danish Center for Education and Research,Sino-Danish College,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Journal of Semiconductors》2022年第1期18-36,共19页半导体学报（英文版）

基　　金：financially supported by the Strategic Priority Research Program of Chinese Academy of Sciences(Grant No.XDB43000000);the CAS-JSPS Cooperative Research Project(No.GJHZ2021131)。

摘　　要：Twist-angle two-dimensional systems,such as twisted bilayer graphene,twisted bilayer transition metal dichalcogenides,twisted bilayer phosphorene and their multilayer van der Waals heterostructures,exhibit novel and tunable properties due to the formation of Moirésuperlattice and modulated Moirébands.The review presents a brief venation on the development of"twistronics"and subsequent applications based on band engineering by twisting.Theoretical predictions followed by experimental realization of magic-angle bilayer graphene ignited the flame of investigation on the new freedom degree,twistangle,to adjust(opto)electrical behaviors.Then,the merging of Dirac cones and the presence of flat bands gave rise to enhanced light-matter interaction and gate-dependent electrical phases,respectively,leading to applications in photodetectors and superconductor electronic devices.At the same time,the increasing amount of theoretical simulation on extended twisted 2D materials like TMDs and BPs called for further experimental verification.Finally,recently discovered properties in twisted bilayer h-BN evidenced h-BN could be an ideal candidate for dielectric and ferroelectric devices.Hence,both the predictions and confirmed properties imply twist-angle two-dimensional superlattice is a group of promising candidates for next-generation(opto)electronics.

关 键 词：twist angle Moirésuperlattice TWO-DIMENSIONAL (opto)electronics 

分 类 号：TB34[一般工业技术—材料科学与工程] TN20[电子电信—物理电子学]