Terahertz Frequency-Dependent Carrier Scattering Rate and Mobility of Monolayer and AA-Stacked Multilayer Graphene

We present the terahertz optical model for AA-stacked multilayer graphene and monolayer graphene considering various scattering mechanisms, such as the charged impurity scattering and surface polar optical phonon scattering. The ac/dc scattering rate and mobility of AA-stacked multilayer graphene are derived. We show that the mobility of AA-stacked multilayer graphene can be potentially higher than that of monolayer graphene if the sample has a large impurity density. We also show that the effective scattering rate is a function of frequency that cannot be captured by the simple Drude model.