Abstract
A drain current model of 2-D monolayer (ML) transition-metal dichalcogenide (TMD) tunnel FETs (TFETs) is proposed. For better accuracy, the proposed model features the following two points: 1) the accurate lateral energy profiles considering the extension of the depletion width ( ${W}_{d}$ ) owing to the reduced dimensionality and 2) the spin- and valley-dependent complex band structure considering the spin-orbit coupling effect. The proposed model is validated by the tight-binding nonequilibrium green function simulation, in the case of ML MoS2 double-gate TFETs. By using the proposed model, the design guideline of ML TMD TFETs is presented.
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