CPM Seminar

Quantum motion of electrons and holes in the random puddle landscape of graphene and bilayer graphene

Enrico Rossi

Department of Physics
College of William and Mary

The transport properties of graphene have puzzled physicists since its discovery in 2004. The interplay of disorder, gapless nature of the dispersion, and chirality of the quasiparticles induces the anomalous transport properties of graphene. In particular, close to the Dirac point the disorder induces strong carrier density fluctuations. In this talk I will present a theoretical approach to characterize the highly inhomogenous carrier density landscape of disordered graphene and bilayer graphene. I will then present a transport theory that is able to properly take into account the strong disorder-induced density inhomogeneities. I will show results for single layer graphene and bilayer graphene. In addition I will discuss the transport properties of disordered graphene p-n-p junctions for which the semiclassical approaches are inadequate and a quantum transport analysis able to take into account long-range disorder and experimentally relevant sizes is necessary.