Structural and electronic properties of Ga1-xInxAs1-yNy quaternary semiconductor alloy on GaAs substrate

We have presented structural and electronic properties of binary (GaAs, GaN and InAs), ternary (Ga1-xInxAs and GaAs1-yNy) and quaternary (Ga1-xInxAs1-yNy) semiconductor alloys by using a first-principles pseudopotential technique. The structural and electronic properties of Zinc-Blende phase of these materials have been calculated by using the local density approximation (LDA) of the density-functional theory (DFT). To obtain the lattice parameter and band gap energy of the (GaInAsN) quaternary semiconductor alloy we separately calculated the lattice constant and band gap energies of ternary semiconductor alloys, namely GaAsN and GaInAs. The calculated lattice constant, bulk modulus and the direct band gaps for studied semiconductors showed great parallelism with the previous available theoretical and experimental studies. (C) 2011 Elsevier B. V. All rights reserved.