Abstract
In this work, we have studied the charge transport characteristics of WTe2 armchair nanoribbon and analyzed the variation in results by applying tensile strain to the nanoribbon. Tungsten ditelluride (WTe2) is a member of the transition metal dichalcogenides family. WTe2 is orthorhombic in structure with lattice parameters a = 0.6282 nm, b = 0.3496 nm, c = 1.407 nm. We have simulated the model using first-principle density functional tight binding theory and the non-equilibrium Green’s function method to study the effect of strain on the transport characteristics. The obtained results are compared with that of the perfectly relaxed nanoribbon. We have applied uniaxial (ϵxx) and biaxial (ϵxx = ϵyy) tensile strain to the nanoribbon. We present the ID-VDS characteristics, transmission spectrum and conductance for different cases. Negative differential resistance (NDR) is observed in all the cases along with a change in peak-to-valley current ratio (PVCR) and negative differential resistance region (NDRR).
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