Impurity Distribution in Single Crystals

Abstract

Impurity heterogeneities in the "core" region of single crystals pulled from the melt were shown to be sensitive to thermal asymmetry, the location of the facet in the crystal, and the orientation of the facet relative to the growth axis. This behavior was explained assuming that the lateral growth rate which controls the incorporation of impurities in the core region is markedly modified by the extent of kinetic supercooling.