Electronic structure of pseudobinary semiconductor alloys In_xGa_1-x and InAs_xSb_1-x

A method calculating detailed electronic properties of the anionic and cationic pseudobinary In_xGa_1-xSb and InAs_xSb_1-x semiconductor alloys is presented. The technique begins with realistic band structures obtained for the constituent compounds by fitting the band-gap symmetry-point energies to experimental data within the pseudopotential scheme. Then the virtual crystal approximation which incorporates compositional disordered as an effective potential is used to calculate the alloys band structures and charge densities. Detailed comparison between the theoretical predictions and experimental data demonstrate the quantitative nature of the method. Bowing parameters for the Ω, X, and L gaps are in good agreement with the experimental results.