Impact of Vacancies on Diffusive and Pseudodiffusive ElectronicTransport in Graphene

Abstract

We present a survey of the effect of vacancies on quantum transport in graphene,exploring conduction regimes ranging from tunnelling to intrinsic transport phenomena.Vacancies, with density up to 2%, are distributed at random either in a balanced mannerbetween the two sublattices or in a totally unbalanced configuration where only atomssitting on a given sublattice are randomly removed. Quantum transmission shows avariety of different behaviours, which depend on the specific system geometry and disorderdistribution. The investigation of the scaling laws of the most significant quantities allowsa deep physical insight and the accurate prediction of their trend over a large energy regionaround the Dirac point.

Keywords

• graphene
• vacancies
• quantum transport