K. Fujita et al., SELF-MODULATING SB INCORPORATION IN SI SIGE SUPERLATTICES DURING MOLECULAR-BEAM EPITAXIAL-GROWTH/, Surface science, 295(3), 1993, pp. 335-339
Self-modulating incorporation of Sb atoms has been found in Si/SiGe su
perlattices grown by conventional solid source Si molecular beam epita
xy. The origin of this phenomenon has been attributed to the differenc
e in the segregation length of Sb atoms in Si and SiGe layers. It has
been found that the segregation length of Sb in Si1-xGex layers increa
ses as the Ge composition, x, increases and that Sb atoms are incorpor
ated mainly in Si layers when Si/SiGe superlattices are grown.