title: Conductance fluctuations in graphene in the presence of long-range disorder.
abstract: The fluctuations in the conductance of graphene that arise from a long-range disorder potential induced by random impurities are investigated with an atomic tight-binding lattice. The screened impurities lead to a slow variation of the background potential and this varies the overall potential landscape as the Fermi energy or an applied magnetic field is varied. As a result, the phase interference varies randomly and leads to fluctuations in the conductance. Recently, experiments have shown that an applied magnetic field produces a remarkable reduction in the amplitude of these conductance fluctuations. We find qualitative agreement with these experiments, and it appears that the reduction in magnetic field of the fluctuations arises from a field induced smoothing of the conductance landscape.
authors.affiliation: School of Electrical, Computer, and Energy Engineering, Arizona State University, Tempe, AZ 85287, USA.
authors.forename: Bobo
authors.initials: B
authors.lastname: Liu
authors.forename: Richard
authors.initials: R
authors.lastname: Akis
authors.forename: David K
authors.initials: DK
authors.lastname: Ferry
authors.forename: Girish
authors.initials: G
authors.lastname: Bohra
authors.forename: Ratchanok
authors.initials: R
authors.lastname: Somphonsane
authors.forename: Harihara
authors.initials: H
authors.lastname: Ramamoorthy
authors.forename: Jonathan P
authors.initials: JP
authors.lastname: Bird