Non-equilibrium dynamics in amorphous Si3B3N7
A. Hannemann, J. C. Schon, M. Jansen, P. Sibani
TL;DR
This study numerically explores the non-equilibrium dynamics of amorphous Si3B3N7, revealing a glass transition at high pressure below 2000 K and demonstrating aging phenomena linked to the energy landscape's geometry.
Contribution
It provides the first detailed numerical analysis of the energy landscape and aging behavior in amorphous Si3B3N7 at high temperatures and pressures.
Findings
Identifies a glass transition below 2000 K at high pressure.
Shows aging behavior in the energy correlation functions.
Links aging to the geometrical properties of the energy landscape.
Abstract
We present numerical investigations of the dynamics on the energy landscape of a realistic model of the high-temperature ceramic a-Si3B3N7. Below a critical temperature Tc = 2000 K, the system is no longer in equilibrium, and we predict that the material has a glass transition in this temperature range at high pressure. Analyzing the two-time energy correlation function shows aging in this system, which is linked to the geometrical properties of the energy landscape.
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Taxonomy
TopicsGlass properties and applications · Material Dynamics and Properties · High-pressure geophysics and materials