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A mechanism of the long-range effect in the processes of crystal growth through boundary layers based on the study of the nature of the chemical bond between the deposited and surface atoms is proposed. It is shown that the spatial distribution of the probability of finding a negative binding charge (i.e. its density) cannot be considered strictly fixed between the nearest neighboring ion cores. It also extends with decreasing quantity to other interatomic regions along the preferred directions which are determined by the electrostatic and electromagnetic fields of atomic cores and their valence electrons. The directivity and intensity of these crystalline fields are much larger than the directivity in the formed amorphous or polycrystalline layer, so they will permeate it up to some thickness. Consequently, in contrast to the clean surface where, due to the absence of atoms from the surface side, the field structure of the crystal changes, crystallographic oriented fields will penetrate to the surface of the boundary layer up to its certain thickness, which ensures the crystallinity of the deposited material.

On Physical Nature of the Long-Range Effect during the Crystal Growth through Boundary Layers