Local Dynamics of Excitations in Glassy Liquids

HT Lee and J Landy and JU Kim and Y Jho, JOURNAL OF THE KOREAN PHYSICAL SOCIETY, 76, 1076-1082 (2020).

DOI: 10.3938/jkps.76.1076

In this study, we propose new elementary processes of the excitation dynamics in glassy liquids, which trigger the structural rearrangement in a local and isolated region known as the cooperative rearrangement region. We identify the existence of primary particles which facilitate local dynamics by using a machine learning technique and a time series analysis. The local soft domains are established by a few soft particles that hop between local energy basins. While particles in contact with these primary soft particles respond non-linearly, other particles not in direct contact with them respond linearly as elastic materials.

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