• 文献标题:   STEM plasmon spectroscopy of free standing graphene
  • 文献类型:   Article
  • 作  者:   BANGERT U, EBERLEIN T, NAIR RR, JONES R, GASS M, BLELOCH AL, NOVOSELOV KS, GEIM A, BRIDDON PR
  • 作者关键词:  
  • 出版物名称:   PHYSICA STATUS SOLIDI AAPPLICATIONS MATERIALS SCIENCE
  • ISSN:   1862-6300
  • 通讯作者地址:   Univ Manchester
  • 被引频次:   16
  • DOI:   10.1002/pssa.200879707
  • 出版年:   2008

▎ 摘  要

Plasmon spectroscopy of the thinnest possible membrane, a single layer of carbon atoms, graphene, has been carried out in conjunction with ab initio calculations of the low loss function. We observe pi- and pi+ sigma-surface plasmon modes in free-standing single sheets at 4.7 eV and 14.8 eV which are substantially red-shifted from their values in graphite. These modes are in very good agreement with the theoretical spectra which find the pi- and pi + pi in-plane modes of graphene at 4.5 eV and 14.5 eV. We also find that there is little loss caused by out-of-plane modes for energies less than about 10 eV. (C) 2008 WILEY-NCH Verlag GmbH & Co. KGaA, Weinheim.