Interpolation of quaternary III-V alloy parameters with surface bowing estimations

Abstract

We present the weighted-sum expression of quaternary parameter estimations via balancing surface bowing estimation errors. Expressions have been derived for both quaternary alloys Ax By Cz D and Ax B1-x Cy D1-y and applied to the band gaps of AlGaInAs, AlGaInP, InAsPSb, GaInAsP, and GaInAsSb. Approximation can be improved by fitting known data of quaternary alloys and maximum deviations are less than 20 meV with respect to the lattice-matched polynomial expressions. © 2007 American Institute of Physics.