• 文献标题:   Tuning the Interlayer Coupling of the Twisted Bilayer Graphene by Molecular Adsorption
  • 文献类型:   Article
  • 作  者:   MENG L, YAN W, YIN LJ, CHU ZD, ZHANG YF, FENG L, DOU RF, NIE JC
  • 作者关键词:  
  • 出版物名称:   JOURNAL OF PHYSICAL CHEMISTRY C
  • ISSN:   1932-7447
  • 通讯作者地址:   Beijing Normal Univ
  • 被引频次:   5
  • DOI:   10.1021/jp4109915
  • 出版年:   2014

▎ 摘  要

We describe a facile method to modulate the local interlayer coupling by adsorption of single-molecule magnets (SMMs) onto twisted bilayer graphene and report the characterization of its electronic band structure using scanning tunneling microscopy and spectroscopy. Low-energy Van Hove singularities (VHSs) and superlattice Dirac cones, induced by the interlayer coupling and graphene-on-graphene moire, respectively, are observed in the tunneling spectra. Our experiments demonstrate that the energy difference of the two VHSs, which reflects the magnitude of interlayer coupling, can be tuned by the local coverage density of molecular adsorption.