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Performance and Energy-per-Bit Modeling of Multilayer Graphene Nanoribbon Conductors

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3 Author(s)
Vachan Kumar ; Microelectronics Research Center, School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, USA ; Shaloo Rakheja ; Azad Naeemi

In this paper, physical models are derived for the effective resistance of multilayer graphene nanoribbon (m-GNR) interconnects. The impact of finite resistive coupling between the layers for top contacted m-GNR interconnects is considered. It is found that the addition of more parallel layers does not necessarily translate into a decrease in the overall resistance of m-GNR interconnects. Rather, the improvement in the effective resistance saturates with an increase in the number of layers. The optimal number of layers to minimize the delay and the energy-delay product of m-GNR interconnects is also evaluated. It is found that the optimal number of layers is a function of the interconnect length, interlayer resistance, and the kind of contact that is used. It is demonstrated that, for short interconnect lengths, m-GNR interconnects with smooth edges perform better compared to copper wires.

Published in:

IEEE Transactions on Electron Devices  (Volume:59 ,  Issue: 10 )