• 文献标题:   Stacking-dependent transport properties in few-layers graphene
  • 文献类型:   Article
  • 作  者:   LIMA MP, PADILHA JE, PONTES RB, FAZZIO A, DA SILVA AJR
  • 作者关键词:   few layers graphene, stacking sequence, electronic transport propertie, firstprinciples calculation
  • 出版物名称:   SOLID STATE COMMUNICATIONS
  • ISSN:   0038-1098 EI 1879-2766
  • 通讯作者地址:   Univ Fed Parana
  • 被引频次:   2
  • DOI:   10.1016/j.ssc.2016.11.012
  • 出版年:   2017

▎ 摘  要

By performing ab initio electronic structure and transport calculations, we investigated the effects of the stacking order (Bernal (AB) and rhombohedral (ABC)) as well as the number of layers, in the electronic structure and charge transport of few-layers graphene (FLG). We observed that for the ABC stack the transport properties are derived from surface states close to the Fermi level connected to dispersive states with an exponential penetration towards the inner layers, whereas for the AB stacking the transport is distributed over all layers. We present a simple model for the resistances as a function of the number of layers which contemplates the different contribution of the surface and inner layers for the transport. However, even if the stackings AB and ABC present completely different electronic and transport properties, both present the same cohesive energies, showing the absence of a thermodynamical preference for a given kind of stacking.