• 文献标题:   Two-Dimensional Graphene with Structural Defects: Elastic Mean Free Path, Minimum Conductivity, and Anderson Transition
  • 文献类型:   Article
  • 作  者:   LHERBIER A, DUBOIS SMM, DECLERCK X, ROCHE S, NIQUET YM, CHARLIER JC
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW LETTERS
  • ISSN:   0031-9007
  • 通讯作者地址:   Catholic Univ Louvain
  • 被引频次:   64
  • DOI:   10.1103/PhysRevLett.106.046803
  • 出版年:   2011

▎ 摘  要

Quantum transport properties of disordered graphene with structural defects (Stone-Wales and divacancies) are investigated using a realistic pi-pi* tight-binding model elaborated from ab initio calculations. Mean free paths and semiclassical conductivities are then computed as a function of the nature and density of defects (using an order-N real-space Kubo-Greenwood method). By increasing the defect density, the decay of the semiclassical conductivities is predicted to saturate to a minimum value of 4e(2)/pi h over a large range (plateau) of carrier density (>0.5 X 10(14) cm(-2)). Additionally, strong contributions of quantum interferences suggest that the Anderson localization regime could be experimentally measurable for a defect density as low as 1%.