Negative differential resistance and effect of defects and deformations in MoS2 armchair nanoribbon MOSFET

Abstract

In this work we present a study on the negative differential resistance behavior and the impact of various deformations {like ripples, twist, wrap} and defects like vacancies and edge roughness on the electronic properties of short-channel MoS2 armchair nanoribbon MOSFETs. The effect of deformation {3 to 7 degree twist or wrap and 0.3 to 0.7 Ang rippling amplitude} and defects on a 10 nm MoS2 ANR FET is evaluated by the density functional tight binding theory and the non-equilibrium Green`s function approach. We study the channel density of states, transmission spectra and the ID VD characteristics of such devices under the varying conditions, with focus on the negative differential resistance behavior. Our results show significant change in the NDR peak to valley ratio and the NDR window with such minor intrinsic deformations, especially with the rippling.