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Configurations of supercooled liquids residing in their local potentialminimum (i.e. in their inherent structure, IS) were found to support a non-zeroshear stress. This IS stress was attributed to the constraint to the energyminimization imposed by boundary conditions, which keep size and shape of thesimulation cell fixed. In this paper we further investigate the influence ofthese boundary conditions on the IS stress. We investigate its importance forthe computation of the low frequency shear modulus of a glass obtaining aconsistent picture for the low- and high frequency shear moduli over the fulltemperature range. Hence, we find that the IS stress corresponds to anon-thermal contribution to the fluctuation term in the Born-Green expression.This leads to an unphysical divergence of the moduli in the low temperaturelimit if no proper correction for this term is applied. Furthermore, we clarifythe IS stress dependence on the system size and put its origin on a more formalbasis.

Influence of inherent structure shear stress of supercooled liquids on their shear moduli