The formation energy of two Li defects was determined in material which had been produced by means of molecular beam epitaxy. The energies for interstitial and substitutional Li were found to be 0.64 and 0.51eV, respectively. It was shown that Li introduced a negligible elastic distortion of the matrix lattice. It was found that an increase in the [Lii]/[LiZn] ratio with increasing Zn/Se flux ratio could be explained by a decrease in the formation energy of the Li interstitial.

A.N.Krasnov: Journal of Crystal Growth, 1994, 141[1,2], 89-92