One master curve for self-diffusion of one atom in different glass-forming liquids

Abstract Self-diffusion of a single atom α in glass-forming liquids, A x B y C z ⋯, is studied from a unified point of view based on the mean-field theory (MFT) proposed recently by the present author, where α ∈ { A , B , C ,...} and x + y + z + cdots = 100. Several experimental data and simulation results available at present are then analyzed consistently with the aid of MFT. Thus, it is shown that there exists a master curve for the long-time self-diffusion coefficient D S L ( α ) of α atom, even though atom α belongs to any different multicomponent glass-forming liquids. This suggests that if a whole data set for D S L ( α ) in a simple glass-forming liquid is once found, only one data point for α atom in any other complex glass-forming liquids is enough to predict a whole control parameter dependence of D S L ( α ) for each α atom belonging to those liquids.