• 文献标题:   Strain in twisted bilayer graphene grown by chemical vapour deposition on Ni surfaces
  • 文献类型:   Article
  • 作  者:   MENDOZA CD, CALIFRER IJ, FREIRE FL
  • 作者关键词:   scanning tunnelling microscopy, twisted bilayer graphene, strain, raman spectroscopy
  • 出版物名称:   APPLIED SURFACE SCIENCE
  • ISSN:   0169-4332 EI 1873-5584
  • 通讯作者地址:  
  • 被引频次:   6
  • DOI:   10.1016/j.apsusc.2020.148884 EA JAN 2021
  • 出版年:   2021

▎ 摘  要

In this work, we have synthesised twisted bilayer graphene on nickel substrate by chemical vapour deposition. The Moire superlattice generated by a misorientation in the stacking of two layers of graphene was studied. Raman spectroscopy was used to identify regions of interest on the films, in which scanning tunnelling microscopy (STM) was implemented to characterise the system in real space with atomic resolution, while also determining the main features caused by the strain on the bilayer structure. With the aid of simple models, we have probed relevant interrelations between features observed by STM and the heterostrain undergone by the film, which could be seen to suggest extra degrees of freedom in the sense of altering the properties of materials.