Floquet Spectrum and Transport Through an Irradiated Graphene Ribbon

Details Floquet Spectrum and Transport Through an Irradiated Graphene Ribbon Floquet Spectrum and Transport Through an Irradiated Graphene Ribbon

2011-06-01

arxiv.org/abs/1106.0302v1

Phys. Rev. Lett. 107, 216601 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4.2 pages, 3 figures

Scientific paper

Graphene subject to a spatially uniform, circularly-polarized electric field supports a Floquet spectrum with properties akin to those of a topological insulator, including non-vanishing Chern numbers associated with bulk bands and current-carrying edge states. Transport properties of this system however are complicated by the non-equilibrium occupations of the Floquet states. We address this by considering transport in a two-terminal ribbon geometry for which the leads have well-defined chemical potentials, with an irradiated central scattering region. We demonstrate the presence of edge states, which for infinite mass boundary conditions may be associated with only one of the two valleys. At low frequencies, the bulk DC conductivity near zero energy is shown to be dominated by a series of states with very narrow anticrossings, leading to super-diffusive behavior. For very long ribbons, a ballistic regime emerges in which edge state transport dominates.

Affiliated with

Also associated with

No associations

Rating

Floquet Spectrum and Transport Through an Irradiated Graphene Ribbon 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 Floquet Spectrum and Transport Through an Irradiated Graphene Ribbon, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Floquet Spectrum and Transport Through an Irradiated Graphene Ribbon will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-493987