Determination of static bond charge properties in Gasub(1-x)Insub(x)As and GaAssub(1-y)Psub(y) solid solutions

The integrated X-ray intensity is determined for some monocrystalline reflections of (GaIn)As and Ga(AsP) layers, grown on GaAs substrates, nearly of those compositions where the scattering amplitude of the spherical atoms vanishes. These reflections are particularly apt to inform about the charge heaping up between next neighbours. By means of a bond charge model the experimental values are interpreted. Besides, data are obtained for the mean square displacement of the matrix atoms in the mixed crystal. The mean square displacements of the atoms in the mixed crystals cannot be extrapolated from those of the end components. The atoms of the substitutional sublattice oscillate less intensively than in its binary compounds. The bond charge, however, changes nearly linearly between the end components. (author)