Trifurcated crystallization and inhomogeneity in GeSe2 glass - art. no. 224206

Thermally induced structural changes of GeSe2 glasses have been studied by Raman scattering from room temperature to crystallization temperature. The Raman spectra in the glassy state change with temperature in an almost reve rsible manner. The degree of the spectral changes differ among samples alth ough the spectra are identical at room temperature. Depending on the degree of the spectral changes, it is found that the GeSe2 glasses crystallize in to three different phases, the beta, alpha, and phi phases ("trifurcated cr ystallization"). The trifurcated crystallization from apparently the same g lassy state is explained in terms of the inhomogeneity in distribution of G e-Ge "wrong" bonds.