The memory kernel of the self-intermediate scattering function on a MD-simulated glass-forming Ni$_{20}$Zr$_{80}$-system

TL;DR

This study investigates the memory kernel of the self-intermediate scattering function in a Ni-Zr glass-forming system, revealing deviations from mode-coupling theory predictions and employing a Gaussian approximation for better short-time dynamics description.

Contribution

It provides new insights into the short-time behavior of the memory kernel in glass-forming systems, challenging existing theoretical predictions.

Findings

Memory kernel deviates from polynomial form predicted by MCT

Gaussian approximation offers a detailed description of short-time dynamics

Results improve understanding of glass transition dynamics in Ni-Zr systems

Abstract

The memory kernel of the self-part of the intermediate scattering function is studied. We found that the short-time behavior of the memory kernel for our MD-simulated glass-forming Ni$_{20}$Zr$_{80}$-system shows a deviation from the polynomial form predicted by MCT. By using the gaussian approximation we give a more detailed description of the short-time dynamics of the system.