Abstract
Bilayer graphene has the very interesting property of an energy gap tunable with the vertical electric field. We propose an analytical model for a bilayer-graphene field-effect transistor, suitable for exploring the design parameter space and to find a device structure with promising performance in terms of transistor operation. Our model, based on the effective mass approximation and ballistic transport assumptions, takes into account bilayer-graphene tunable gap and self polarization, and includes all band-to-band tunneling current components, which are shown to represent the major limitation to transistor operation, because the limited achievable energy gap is not sufficient to obtain a large Ion/Ioff ratio.
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