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

Crystallization effects in annealed thin GeS2 films photodiffused with Ag

“…This prevents incidence of intercluster changes. We expect that doping the host glass with Ag will lead to increasing internal pressure and stress in the hosting backbone and looked for some blue shift in the vibration modes that has been documented for the GeSe [17] and Ge-S [18] systems. Murase et al [18] have found for the Ge-S system blue shift in the Raman mode frequency starting at external pressure of 10 kbar [18].…”

Short-range order analysis and electrical properties of As30Se70−xSnx glassy system

“…The results for N c and V a given in Table 4, for As 30 Se 70 and As 30 Se 67 Sn 3 , show a satisfactory agreement with the discussion, where V a decreases with increase of N c . The study on materials containing heavy elements, Sn is hardly given, since physical properties of such glasses may be influenced substantially by metallic characters which render the coordination numbers changeable [19,28,29]. It may be quite starting that the N c dependence resembling that of the atomic volume is discernible for the optical band-gap energy E g .…”

Aging process of photosensitive chalcogenide films deposited by electron beam deposition

“…1(a) and (b) presents the Raman and IR spectra of bulk glasses with composition GeS 2 , Ge 25 Sb 10 S 65 and Ge 15 Sb 20 S 65 (2S1G). Before discussing the vibrational spectra of glass 2S1G it is useful to review briefly the vibrational characteristics of the GeS 2 glass [21][22][23][24]. Considering the structural unit GeS 4/2 (tetrahedral entities with four bridging sulfur atoms), one can assign the 340 cm −1 band to the GeS 4/2 symmetric stretching mode ( 1 ) active mainly in Raman, and the 370 cm −1 band to its asymmetric stretching mode ( 3 ) active mainly in the IR.…”