Investigating the effect of slip and strain on electron transport in bilayer hydrogenated graphene-like borophene

Abstract

In this research, the electronic and transport properties of the bilayer graphene-like borophene saturated with hydrogen atoms (2L-gBH) have been investigated in the density functional theory framework and non-equilibrium Green's function method. For this purpose, partial density of states, electronic band structure, and current-voltage characteristics have been calculated. In addition, the effects of two layers sliding over each other and also decreasing the distance between two layers on the current-voltage characteristic have been investigated, as well as the uniaxial strains. The results indicated that 2L-gBH behaved as a metal and had four Dirac points close to the Fermi energy, and the strains displaced these Dirac points. Moreover, it was perceived that the current densities in two crystal directions were anisotropic and could be controlled by modifying the distance between the two layers and applying the compressive strains. Based on the results, 2L-gBH is suggested as a suitable two-dimensional material for nanoelectronic devices and nano switches.