Spontaneously assembling periodic composition-modulated InGaAsP structures

It is established theoretically and experimentally that in certain temperat ure and composition ranges the solid solutions InGaAsP comprise a system of strained, alternating (in mutually perpendicular directions [100] and [010 ]) domains of a solid solution with two different compositions and differen t lattice constants. The domains are clearly seen at the surface of an epit axial film and wash out into its depth in the direction of the substrate. T he data obtained most likely show spinodal decomposition of InGaAsP solid s olutions in the experimental samples. (C) 1999 American Institute of Physic s. [S1063-7826(99)02209-7].