Temperature Dependence of the Structure Factor ofAs2Se3Glass Up to the Glass Transition

Abstract

The temperature dependence of the structure factor of glassy ${\mathrm{As}}_2$ ${\mathrm{Se}}_3$ has been measured. Surprising results were found for the first peak, which shows a large increase in intensity from 40 K to the glass transition temperature, $T_g$; in contrast the second peak decreases in this range. The first peak corresponds to interlayer correlation in the glass. Its increase indicates a smoothing of the layers which may lead to layers slipping past one another, thus decreasing the viscosity above $T_g$.