Drude Conductivity of Dirac Fermions in Graphene

Details Drude Conductivity of Dirac Fermions in Graphene Drude Conductivity of Dirac Fermions in Graphene

2010-07-27

arxiv.org/abs/1007.4623v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

Electrons moving in graphene behave as massless Dirac fermions, and they exhibit fascinating low-frequency electrical transport phenomena. Their dynamic response, however, is little known at frequencies above one terahertz (THz). Such knowledge is important not only for a deeper understanding of the Dirac electron quantum transport, but also for graphene applications in ultrahigh speed THz electronics and IR optoelectronics. In this paper, we report the first measurement of high-frequency conductivity of graphene from THz to mid-IR at different carrier concentrations. The conductivity exhibits Drude-like frequency dependence and increases dramatically at THz frequencies, but its absolute strength is substantially lower than theoretical predictions. This anomalous reduction of free electron oscillator strength is corroborated by corresponding changes in graphene interband transitions, as required by the sum rule. Our surprising observation indicates that many-body effects and Dirac fermion-impurity interactions beyond current transport theories are important for Dirac fermion electrical response in graphene.

Affiliated with

Also associated with

No associations

Rating

Drude Conductivity of Dirac Fermions in 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 Drude Conductivity of Dirac Fermions in Graphene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drude Conductivity of Dirac Fermions in Graphene will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-320334