Role of attractive forces in the relaxation dynamics of supercooled liquids

Abstract

The attractive tail of the intermolecular interaction affects very weakly the structural properties of liquids, while it affects dramatically their dynamical ones. Via the numerical simulations of model systems not prone to crystallization, both in three and in two spatial dimensions, here we demonstrate that the non-perturbative dynamical effects of the attractive forces are tantamount to a rescaling of the activation energy by the glass transition temperature $T_g$: systems only differing in their attractive interaction have the same structural and dynamical properties if compared at the same value of $T/T_g$.

arXiv commentPhysical Review Letters, in press

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• Unifying description of the vibrational anomalies of amorphous materials
• Mechanical disorder of sticky-sphere glasses. II. Thermo-mechanical inannealability
• Comparing four hard-sphere approximations for the low-temperature WCA melting line
• Variability of mesoscopic mechanical disorder in disordered solids
• How attractive and repulsive interactions affect structure ordering and dynamics of glass-forming liquids?
• Manipulating the Glass Transition in Nanoscale
• Revealing the Geometrical and Vibrational Properties of the Defects Driving the Boson Peak
• Comparing zero-parameter theories for the WCA and harmonic-repulsive melting lines
• Elementary processes in dilatational plasticity of glasses