Investigation of stability of (Ge,Sn)-(S,or Se)42 cluster vibrational spectra

The insistent two mode type behavior of the A₁ and high frequency F₂ bands in the tin contained glasses is reproduced by our vibrational calculations based on the outrigger-raft with some modifications. High pressure Raman spectra suggest an instability of the tin tetrahedral bonding. Comparative study of glassy and crystalline Ge(Se, or S)₂ by high pressure Raman scattering gives important informations about the strain field and the topological order in the glasses.