• 文献标题:   Self-doping effects in epitaxially grown graphene
  • 文献类型:   Article
  • 作  者:   SIEGEL DA, ZHOU SY, EL GABALY F, FEDOROV AV, SCHMID AK, LANZARA A
  • 作者关键词:   band structure, carbon, doping, electron microscopy, monolayer, nanostructured material, photoelectron spectra, quasiparticle, surface morphology
  • 出版物名称:   APPLIED PHYSICS LETTERS
  • ISSN:   0003-6951
  • 通讯作者地址:   Univ Calif Berkeley
  • 被引频次:   29
  • DOI:   10.1063/1.3028015
  • 出版年:   2008

▎ 摘  要

Self-doping in graphene has been studied by examining single-layer epitaxially grown graphene samples with differing characteristic lateral terrace widths. Low energy electron microscopy was used to gain real-space information about the graphene surface morphology, which was compared with data obtained by angle-resolved photoemission spectroscopy to study the effect of the monolayer graphene terrace width on the low energy dispersions. By altering the graphene terrace width, we report significant changes in the electronic structure and quasiparticle relaxation time of the material, in addition to a terrace width-dependent doping effect.