Mobility in semiconducting graphene nanoribbons: Phonon, impurity, and edge roughness scattering

The transport properties of carriers in semiconducting graphene nanoribbons are studied by comparing the effects of phonon, impurity, and line-edge roughness scattering. It is found that scattering from impurities located at the surface of nanoribbons and from acoustic phonons are as important as line-edge roughness scattering. The relative importance of these scattering mechanisms varies with the temperature, Fermi-level location, and the width of the ribbons. Based on the analysis, strategies for improvement of low-field mobility are described.