• 文献标题:   Insulating behavior in metallic bilayer graphene: Interplay between density inhomogeneity and temperature
  • 文献类型:   Article
  • 作  者:   HWANG EH, DAS SARMA S
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   1098-0121
  • 通讯作者地址:   Univ Maryland
  • 被引频次:   34
  • DOI:   10.1103/PhysRevB.82.081409
  • 出版年:   2010

▎ 摘  要

We investigate bilayer graphene transport in the presence of electron-hole puddles induced by long-range charged impurities in the environment. We explain the insulating behavior observed in the temperature-dependent conductivity of low mobility bilayer graphene using an analytic statistical theory taking into account the non-mean-field nature of transport in the highly inhomogeneous density and potential landscape. We find that the puddles can induce, even far from the charge neutrality point, a coexisting metallic and insulating transport behavior due to the random local activation gap in the system.