ガラスの自発的エイジングにおける構造緩和と振動緩和(非平衡系の物理-非平衡ゆらぎと集団挙動-,研究会報告)

Abstract

It is estimated that the time dependence of the configurational entropy of glass is zero, but that of its vibrational entropy shows a constant decrease with the smallest change, while maintaining a constant fictive temperature and an isostructural state. The results indicate that the volume of glass decreases at a constant time rate through spontaneous aging at a constant temperature. It is emphasized that the existence of the constant configurational entropy below the glass transition temperature is the basic feature of glass forming. The nanometer-size of the Intermediate Range Orders (IROs) in glass determines the residual entropy. The time symmetry in glass is spontaneously violated.