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Brillouin scattering on binary GexSe1-x glasses has revealed a SENSATIONAL light-induced softening of the of the longitudinal
elastic constant (C11) by nearly 50% over a narrow compositional range centered near the mean-field rigidity transition
composition of xc=019(1). The use of increased illumination power to excite Brillouin scattering in network glasses has
opened new ground: it has shown that some aspects of light-induced effects are
intrinsically related to the elastic response of network glasses.
Just now published in Physical Review Letters: 92,24501, 2004
Article: Light-induced Softening of Network Glasses Observed near the Mean-Field Rigidity
Transition, by J. Gump, I. Finkler, H. Xia, R. Sooryakumar, W. J. Bresser, P. Boolchand
Gump, Boolchand et al."Breaking news article"(pdf file).
- New microscope images show nano-size objects in arsenic chalcogenides.
Could you comment, discuss, or make suggestions related to the physical
interpretation ? Please see the last paper from "Chalcogenide Letters"
(posted on this site)
- Bruce Aitken (Corning Glass, USA)"I have seen similar features when
analyzing the homogeneity of our (Ge)AsS glasses after fibre drawing
with the electron microprobe. Subsequent analysis of the affected area
usually reveals a depletion in S (or perhaps Se in this case ?)".
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