Excitonic Effects on the Optical Response of Graphene and Bilayer Graphene

Details Excitonic Effects on the Optical Response of Graphene and Bilayer Graphene Excitonic Effects on the Optical Response of Graphene and Bilayer Graphene

2009-06-04

arxiv.org/abs/0906.0969v3

Phys. Rev. Lett. 103, 186802 (2009)

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevLett.103.186802

We present first-principles calculations of many-electron effects on the optical response of graphene, bilayer graphene, and graphite employing the GW-Bethe Salpeter equation approach. We find that resonant excitons are formed in these two-dimensional semimetals. The resonant excitons give rise to a prominent peak in the absorption spectrum near 4.5 eV with a different line shape and significantly redshifted peak position from those of an absorption peak arising from interband transitions in an independent quasiparticle picture. In the infrared regime, our calculated optical absorbance per graphene layer is approximately a constant, 2.4%, in agreement with recent experiments; additional low frequency features are found for bilayer graphene because of band structure effects.

Affiliated with

Also associated with

No associations

Rating

Excitonic Effects on the Optical Response of Graphene and 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 Excitonic Effects on the Optical Response of Graphene and Bilayer Graphene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Excitonic Effects on the Optical Response of Graphene and Bilayer Graphene will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-495193