TY - JOUR
T1 - Scattering mechanisms and Boltzmann transport in graphene
AU - Adam, Shaffique
AU - Hwang, E. H.
AU - Das Sarma, S.
PY - 2008/3
Y1 - 2008/3
N2 - Different scattering mechanisms in graphene are explored and conductivity is calculated within the Boltzmann transport theory. We provide results for short-range scattering using the random phase approximation for electron screening, as well as analytical expressions for the dependence of conductivity on the dielectric constant of the substrate. We further examine the effect of ripples on the transport using a surface roughness model developed for semiconductor heterostructures. We find that close to the Dirac point, σ ∼ nβ, where β = 1, 0,- 2 for Coulomb, short-range and surface roughness, respectively; implying that Coulomb scattering dominates over both short-range and surface roughness scattering at low density.
AB - Different scattering mechanisms in graphene are explored and conductivity is calculated within the Boltzmann transport theory. We provide results for short-range scattering using the random phase approximation for electron screening, as well as analytical expressions for the dependence of conductivity on the dielectric constant of the substrate. We further examine the effect of ripples on the transport using a surface roughness model developed for semiconductor heterostructures. We find that close to the Dirac point, σ ∼ nβ, where β = 1, 0,- 2 for Coulomb, short-range and surface roughness, respectively; implying that Coulomb scattering dominates over both short-range and surface roughness scattering at low density.
KW - Boltzmann transport
KW - Graphene
KW - Ripples
UR - https://www.scopus.com/pages/publications/39649117976
U2 - 10.1016/j.physe.2007.09.064
DO - 10.1016/j.physe.2007.09.064
M3 - Article
AN - SCOPUS:39649117976
SN - 1386-9477
VL - 40
SP - 1022
EP - 1025
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
IS - 5
ER -