Observation of chaotic behaviour in physical ageing of chalcogenide glasses

Abstract

Theory of strange attractors is shown to be adequately applied to analyze kinetics of physical ageing revealed in structural relaxation of Se-rich As-Se glasses below glass transition. Kinetics of enthalpy losses induced by prolonged storage in natural conditions is used to determine phase space reconstruction parameters. The observed chaotic behaviour (involving chaos and fractal consideration such as detrended fluctuation analysis, attractor identification using phase space representation, delay coordinates, mutual information, false nearest neighbours, etc.) reconstructed via TISEAN is treated within potential energy landscape as diversity of multiple transitions between different basins-metabasins towards more thermodynamically equilibrium state, minimizing the free energy of the system. © 2020 Elsevier B.V., All rights reserved.