Construction of twisted graphene–silicene heterostructures  

作　　者：Guangyuan Han Huan Shan Lizhi Zhang Wenpeng Xu Zhao-Yan Gao Hui Guo Geng Li Hong-Jun Gao 

机构地区：[1]Beijing National Center for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [2]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190,China [3]National Center for Nanoscience and Technology,Chinese Academy of Sciences,Beijing 100190,China [4]Songshan Lake Materials Laboratory,Dongguan 523808,China

出　　处：《Nano Research》2023年第5期7926-7930,共5页纳米研究（英文版）

基　　金：the Ministry of Science and Technology of China(Nos.2019YFA0308500 and 2018YFA0305800);the National Natural Science Foundation of China(Nos.61888102,51991340,and 52072401);the Chinese Academy of Sciences Project for Young Scientists in Basic Research(No.YSBR-003).

摘　　要：Van der Waals stacking of two-dimensional crystals with rotation or mismatch in lattice constants gives rise to rich physical phenomena that are closely related to the strong correlations and band topology.Twisted graphene and silicene heterobilayers have been theoretically predicted to host a tunable transport gap due to the mismatch of Dirac cones in the graphene and silicene layers.However,experimental realization of such twisted structure is challenging.Here,we report the formation of twisted graphene/silicene bilayers on Ru(0001)crystal via intercalation.Different moirépatterns form as single-crystalline graphene grows over different grains of the Ru surface.After silicon intercalation,graphene/silicene bilayers are observed with different twisting angles on top of different grains of the Ru substrate.Our work provides a new pathway towards construction of graphene based twisted heterobilayers.

关 键 词：twisted heterobilayers GRAPHENE SILICENE scanning tunneling microscopy first-principles calculations 

分 类 号：O61[理学—无机化学]