Hole Mobility Calculation for Monolayer Molybdenum Tungsten Alloy Disulfide

Abstract

A simple band model using higher order non-parabolic effect was adopted for single layer molybdenum tungsten alloy disulfide (i.e., ${\mathrm{Mo}}_{1-x}{\mathrm{W}}_x{\mathrm{S}}_2$). The first-principles method considering $2\times 2$ supercell was used to study band structure of single layer alloy ${\mathrm{Mo}}_{1-x}{\mathrm{W}}_x{\mathrm{S}}_2$ and a simple band (i.e., effective mass approximation model, EMA) model with higher order non-parabolic effect was used to fit the first-principle band structures in order to calculate corresponding the hole mobility. In addition, we investigate the alloy scattering effect on the hole mobility of ${\mathrm{Mo}}_{1-x}{\mathrm{W}}_x{\mathrm{S}}_2$.