Interstep interaction in solution growth; (101) ADP face

Michelson interferometry combined with X-ray topography was applied to study growth morphology and kinetics of the (101) ADP face in a flowing solution. Step velocity was measured as a function of different parameters. The data reveal a step-step interaction at average distances of the order of ≈ 1 μm. This interaction is interpreted in the terms of surface diffusion. Parameters of step motion and adsorption on the surface are determined. Azimuthal growth anisotropy is related to crystal structure. A formula giving the azimuthally anisotropic hillock slope versus supersaturation on a complex dislocation source plus experimental dependencies of the hillock slope on the supersaturation for various dislocation sources enabled us to determine the free surface energy of the step riser α = 29 erg/cm2 and the Burgers vector of the growth sources. “Quantization” of the measured hillock slopes in the whole supersaturation region supposes identical structure of the dislocation sources of equal strength.