Coordination dependent vibrational properties of amorphous semiconductors alloys

Contributors:   G. Lucovsky, Robert J. Nemanich, S.A. Solin, and R.C. Keezer

ABSTRACT

The i.r., Raman and depolarization spectra of the amorphous pseudo-binary alloy systems (GeS2)1-χ(As2S3)χ and (GeSe2)1-χ(As2Se3)χ are reported here. In contrast to the one-mode behavior that is anticipated on the basis of the mass ratio of the alloy atoms (Ge/As), two bond-stretching modes are observed in both the i.r. and Raman spectra. This new type of phonon behavior is interpreted in terms of differences in the local coordination via a chemical bonding model.

Publisher: Solid State Communications,   Volume: 17,   1567-1572 ||  Published: 1975-12 ||   PDF (477.74 KB) ||   Read more...