01745nas a2200169   4500008004100000022001400041245009700055210006900152260000800221300001100229490000800240520113000248100001801378700002401396700003401420856012101454       2022                        eng d  a2470-004500aIdentifying structural signature of dynamical heterogeneity via the local softness parameter0 aIdentifying structural signature of dynamical heterogeneity via   cAPR  a0446040 v1053 a<p>
	In this work we study the relationship between the softness of a mean-field caging potential and dynamics at the local level. We first describe the local softness, which shows a distribution, thus identifying structural heterogeneity. We show that the lifetime of the softness parameter is connected to the lifetime of the well-known cage structure in supercooled liquids. Finally, our theory predicts that the local softness and the local dynamics is causal below the onset temperature where there is a decoupling between the short and long time dynamics, thus allowing a static description of the cage. With the decrease in temperature, the correlation between structure and dynamics increases. The study shows that at lower temperatures, the structural heterogeneity increases, and since the structure becomes a better predictor of the dynamics, it leads to an increase in the dynamical heterogeneity. We also find that the softness of a hard, immobile region evolves with time and becomes soft and eventually mobile due to the rearrangements in the neighborhood, confirming the well-known facilitation effect.</p>
1 aSharma, Mohit1 aNandi, Manoj, Kumar1 aBhattacharyya, Sarika, Maitra  uhttps://library.ncl.res.in/content/identifying-structural-signature-dynamical-heterogeneity-local-softness-parameter