Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2008-02-03
Phys. Rev. B 77, 195413 (2008)
Physics
Condensed Matter
Disordered Systems and Neural Networks
25 pages, 21 figures
Scientific paper
10.1103/PhysRevB.77.195413
We analyze the competing effects of moderate to strong Coulomb electron-electron interactions and weak quenched disorder in graphene. Using a one-loop renormalization group calculation controlled within the large-N approximation, we demonstrate that, at successively lower energy (temperature or chemical potential) scales, a type of non-Abelian vector potential disorder always asserts itself as the dominant elastic scattering mechanism for generic short-ranged microscopic defect distributions. Vector potential disorder is tied to both elastic lattice deformations ("ripples") and topological lattice defects. We identify several well-defined scaling regimes, for which we provide scaling predictions for the electrical conductivity and thermopower, valid when the inelastic lifetime due to interactions exceeds the elastic lifetime due to disorder. Coulomb interaction effects should figure strongly into the physics of suspended graphene films, where rs > 1; we expect vector potential disorder to play an important role in the description of transport in such films.
Aleiner Igor L.
Foster Matthew S.
No associations
LandOfFree
Graphene via large N I: Renormalization does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Graphene via large N I: Renormalization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Graphene via large N I: Renormalization will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-217004