Nonequilibrium dynamics in an amorphous solid
Sunil P. Singh, Shankar P. Das
TL;DR
This paper investigates the non-equilibrium aging dynamics of an amorphous solid using a soft-spin model, revealing KWW-like aging behavior and analyzing FDT violation.
Contribution
It introduces a theoretical model capturing aging and FDT violation in amorphous solids, extending previous empirical findings with a detailed dynamical analysis.
Findings
Aging follows a modified KWW form similar to dielectric loss data.
FDT violation is characterized in both time and correlation windows.
The model provides insights into non-equilibrium behavior of glasses.
Abstract
The non-equilibrium dynamics of an amorphous solid is studied with a soft-spin type model. We show that the aging behavior in the glassy state follows a modified Kohlrausch-Williams-Watts (KWW) form similar to that obtained in Phys. Rev. Lett. {\bf 95}, 055702 (2005) from analysis of the dielectric loss data. The nature of the fluctuation-dissipation theorem (FDT) violation is also studied in the time as well as correlation windows.
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Taxonomy
TopicsMaterial Dynamics and Properties · Theoretical and Computational Physics · Nonlinear Dynamics and Pattern Formation