Forum of chalcogeniders

Mihail Trunov The non-Hookian behavior of chalcogenide glasses under irradiation: A nanoindentation study.(pdf file).

Polarization-dependent, laser induced anisotropic photodeformation of amorphous chalcogenides(pdf file).

M. Popescu, F. Sava, K. Shimakawa The first report on oscillation of the thickness of a-Se during illumination(pdf file).

We have recently discovered temporal oscillations in the relaxation of conductivity of thin amorphous films of SnSe2 prepared by pulse laser deposition. The oscillation period is around 15 minutes.These oscillations are specific to amorphous film and are lacking in the films heated at 200 deg. C.

Popescu et al." First short report on the new phenomenon"(pdf file).

Our results provide a new and universal description, which can simultaneously explain the photoinduced volume expansion and shrinkage Just now published in Physical Review Letters: 95,206803, 2005 Article: Photoinduced volume changes in amorphous selenium, by J. Hegedus, K. Kohary, D. G. Pettifor, K. Shimakawa, S. Kugler

Hegedus et al." Modelling of the photoinduced change of volume in amorphous selenium" (pdf file).

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 ?)".