Scaling of Volumetric Data in Model Systems Based on the Lennard-Jones Potential

Abstract

The crucial problem for better understanding the nature of glass transition and related relaxation phenomena is to find proper interrelations between molecular dynamics and thermodynamics of viscous systems. To gain this aim the recently observed density scaling of viscous liquid dynamics has been very intensively and successfully studied for last years. However, previous attempts at related scaling of volumetric data yielded results inconsistent with those found from the density scaling of molecular dynamics. In this Letter, we show that volumetric data obtained from simulations in simple molecular models based on the Lennard-Jones (LJ) potential, such as Kob-Andersen binary liquids and the Lewis-Wahnström o-terphenyl model, can be scaled by using the same value of the exponent, which scales dynamic quantities and is directly related to the exponent of the repulsive inverse power law that underlies short-range approximations of the LJ potential.

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Cited by in corpus (8)

• Determination of the Thermodynamic Scaling Exponent from Static, Ambient-Pressure Quantities
• Activation Volume in the Density Scaling Regime: Equation of State and Its Test by Using Experimental and Simulation Data
• A pathway towards proper modeling of physical properties
• Virial-potential energy correlation and its relation to the density scaling for quasi-real model systems
• Equation of state in the generalized density scaling regime studied from ambient to ultra-high pressure conditions
• Dynamic heterogeneity of glass-forming liquids in the density scaling regime
• Role of entropy in the thermodynamic evolution of the time scale of molecular dynamics near the glass transition
• Emergence of cooperatively reorganizing cluster and super-Arrhenius dynamics of fragile supercooled liquids