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Impact of crystallographic orientation and impurity scattering in Graphene-Base Heterojunction Transistors for Terahertz Operation

The influence of the crystal orientation on the performance of silicon-based Graphene-Base Heterojunction Transistors (GBHTs) for terahertz operation is investigated by means of an in-house developed simulator based on quantum transport coupled with Poisson equation. The effect of impurity scattering is included, finding that terahertz operation is possible even considering the reduction of the mobility due to dopants.