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Ab-initio-NEGF Fundamental Roadmap for Carbon-Nanotube and Two-Dimensional-Material MOSFETs at the Scaling and VDD Limit
Aryan Afzalian
https://arxiv.org/abs/2507.00599

Ab-initio-NEGF Fundamental Roadmap for Carbon-Nanotube and Two-Dimensional-Material MOSFETs at the Scaling and VDD Limit
Using accurate Hybrid-Functional DFT coupled with the Non-Equilibrium Green's function (NEGF) formalism, we explore and benchmark the fundamental scaling limits of CNT-FETs against Si and 2D-material MoS$_2$ and HfS$_2$ Nanosheets, highlighting their potential for gate length (L) and supply voltage (VDD) scaling down to 5 nm and to 0.5 V, respectively. The highest drive current is achieved by CNT-FETs with sub 1.3 nm diameters down to $L = 9$ nm and using VDD in the 0.45-0.5V range. Below $L = …