• 文献标题:   Disorder and screening in decoupled graphene on a metallic substrate
  • 文献类型:   Article
  • 作  者:   MARTIN SC, SAMADDAR S, SACEPE B, KIMOUCHE A, CORAUX J, FUCHS F, GREVIN B, COURTOIS H, WINKELMANN CB
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   1098-0121 EI 1550-235X
  • 通讯作者地址:   Univ Grenoble Alpes
  • 被引频次:   8
  • DOI:   10.1103/PhysRevB.91.041406
  • 出版年:   2015

▎ 摘  要

We report the coexistence of charge puddles and topographic ripples in graphene decoupled from the Ir(111) substrate it was grown on. We show the topographic and the charge disorder to be locally correlated as a result of the intercalation of molecular species. From the analysis of quasiparticle scattering interferences, we find a linear dispersion relation, demonstrating that graphene on a metal can recover its intrinsic electronic properties. The measured Fermi velocity v(F) = 0.9 +/- 0.04x10(6) m/s is lower than in graphene on dielectric substrates, pointing to a strong screening of electron-electron interactions in graphene by the nearby metallic substrate.