Anomalous growth of thermoelectric power in gapped graphene

Details Anomalous growth of thermoelectric power in gapped graphene Anomalous growth of thermoelectric power in gapped graphene

2012-02-07

arxiv.org/abs/1202.1362v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 1 figure

Scientific paper

There exist experiments indicating that at certain conditions like an appropriate substrate a gap of the order of 10 meV can be opened at the Dirac points of a quasi-particle spectrum of graphene. We demonstrate that opening of such a gap can result in appearance of a fingerprint bump of the Seebeck signal when the chemical potential approaches the gap edge. A magnitude of the bump can be up to one order higher than already large value of the thermopower occurring in graphene. Such a giant effect, accompanied by the non-monotonous dependence on the chemical potential, is related to the emergence of a new channel of quasi-particle scattering from impurities with the relaxation time strongly dependent on the energy. We analyze behavior of conductivity and thermopower in such system accounting for quasi-particle scattering from impurities with the model potential in self-consistent scheme. Reproducing the existing results for the case of gapless graphene we demonstrate a failure of the simple Mott formula in the case under consideration.

Affiliated with

Also associated with

No associations

Rating

Anomalous growth of thermoelectric power in gapped 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 Anomalous growth of thermoelectric power in gapped graphene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anomalous growth of thermoelectric power in gapped graphene will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-578942