We obtain the output and transfer characteristics of graphene field-effect transistors by using the charge-control model for the current, based on the solution of the Boltzmann equation in the field-dependent relaxation time approximation. Closed expressions for the conductance, transconductance, and saturation voltage are derived. We found good agreement with the experimental data of Meric et al. Nat. Nanotechnol. vol. 3, p. 684, 2008 without assuming carrier density-dependent velocity saturation.
- high field effect
- saturation velocity
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Computer Science Applications