Low temperature properties of glasses—Unsolved problems

Abstract

Al~tract, Glasses show very interesting behaviour well below the glass transition teml~rature. Inspire of various experimental observations, even simple quantitative explanations relating these relaxation phenomena to structural properties are absent. In this paper we have tried to point out a phenomenological approach to this problem by identifying certain parameters which we think can be used to characterize these relaxations. Keywards. Glasses; relaxation; tunnelling model.