Multi-layer graphene field-effect transistors for improved device performance

We have noticed the importance of noise impacting the performances of nano-patterned graphene FETs. We performed the first experimental study on multi-layer graphene FETs to address the charge and current distribution. We have developed a model describing the coupling between graphene layers including interlayer screening effects. The model does not involve modification of the band structure for multiple-layer graphene. The model is in good agreement with the experimental results as well as previous studies on intercalated graphite structures. Noise reduction in few-layer graphene FETs can be understood within this model as well. For the above reason, we propose two or three-layer graphene to be a better choice for aggressively nano-patterned devices.