Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2008-11-26
Phys. Rev. B 79, 165422 (2009)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
6 pages, accepted for publication in Physical Review B
Scientific paper
We formulate a theory of transport in graphene bilayers in the weak momentum scattering regime in such a way as to take into account contributions to the electrical conductivity to leading and next-to-leading order in the scattering potential. The response of bilayers to an electric field cannot be regarded as a sum of terms due to individual layers. Rather, interlayer tunneling and coherence between positive- and negative-energy states give the main contributions to the conductivity. At low energies, the dominant effect of scattering on transport comes from scattering within each energy band, yet a simple picture encapsulating the role of collisions in a set of scattering times is not applicable. Coherence between positive- and negative-energy states gives, as in monolayers, a term in the conductivity which depends on the order of limits. The application of an external gate, which introduces a gap between positive- and negative-energy states, does not affect transport. Nevertheless the solution to the kinetic equation in the presence of such a gate is very revealing for transport in both bilayers and monolayers.
Culcer Dimitrie
Winkler Reinhard
No associations
LandOfFree
External gates and transport in biased bilayer graphene 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 External gates and transport in biased bilayer graphene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and External gates and transport in biased bilayer graphene will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-231807