Electronic and positron properties of zinc-blende structure of GaN, AlN, and their alloy Ga1-xAlxN

Abstract

The empirical pseudopotential method was used to investigate the electronic and positron band structures and charge densities of GaN, AlN and their alloy in the zinc-blende structure. For the ternary alloy Ga1-xAlxN, the virtual crystal approximation was coupled with the pseudopotential method. The angular correlation of the positron annihilation radiation along with the different crystallographic directions in the crystals were also calculated.