Band gap versus composition and demonstration of Vegard’s law for In1−<i>x</i>Ga<i>x</i>As<i>y</i>P1−<i>y</i> lattice matched to InP

Abstract

Measurements of lattice parameters and compositions for In1−xGaxAsyP1−y lattice matched to InP demonstrate the validity of Vegard’s law for this quaternary. The measured compositional dependence of the band gap shows a bowing parameter smaller than predicted from the previously measured band gaps of the four constituent ternaries.