Effective medium theory for disordered two-dimensional graphene
Mesoscale and Nanoscale Physics
2009-06-20 v2 Disordered Systems and Neural Networks
Abstract
We develop an Effective Medium Theory to study the electrical transport properties of disordered graphene. The theory includes non-linear screening and exchange-correlation effects allowing us to consider experimentally relevant strengths of the Coulomb interaction. Assuming random Coulomb impurities, we calculate the electrical conductivity as a function of gate voltage describing quantitatively the full cross-over from the fluctuations dominated regime around the Dirac point to the large doping regime at high gate voltages. We find that the conductivity at the Dirac point is strongly affected by exchange correlation effects.
Cite
@article{arxiv.0809.1425,
title = {Effective medium theory for disordered two-dimensional graphene},
author = {Enrico Rossi and S. Adam and S. Das Sarma},
journal= {arXiv preprint arXiv:0809.1425},
year = {2009}
}
Comments
Final version, accepted for publication in Phys. Rev. B