Relaxation in glassforming liquids and amorphous solids

Date
2000-01-01
Authors
Angell, C. Austin
Ngai, Kia
McKenna, Greg
McMillan, Paul
Martin, Steve
Journal Title
Journal ISSN
Volume Title
Publisher
Altmetrics
Authors
Research Projects
Organizational Units
Journal Issue
Series
Abstract

The field of viscousliquid and glassysolid dynamics is reviewed by a process of posing the key questions that need to be answered, and then providing the best answers available to the authors and their advisors at this time. The subject is divided into four parts, three of them dealing with behavior in different domains of temperature with respect to the glass transition temperature, Tg,and a fourth dealing with “short time processes.” The first part tackles the high temperature regime T>Tg, in which the system is ergodic and the evolution of the viscousliquid toward the condition at Tg is in focus. The second part deals with the regime T∼Tg, where the system is nonergodic except for very long annealing times, hence has time-dependent properties (aging and annealing). The third part discusses behavior when the system is completely frozen with respect to the primary relaxation process but in which secondary processes, particularly those responsible for “superionic” conductivity, and dopart mobility in amorphous silicon, remain active. In the fourth part we focus on the behavior of the system at the crossover between the low frequency vibrational components of the molecular motion and its high frequency relaxational components, paying particular attention to very recent developments in the short time dielectric response and the high Qmechanical response.

Description

The following article appeared in Journal of Applied Physics 88 (2000): 3113–3157, doi:10.1063/1.1286035.

Keywords
Amorphous solids, Annealing, Liquid solid interfaces, Viscosity, Amorphous metals, Amorphic semiconductors, Dielectric response, Glass transitions
Citation
DOI
Collections