The instantaneous shear modulus in the shoving model

摘要: We point out that the instantaneous shear modulus G∞ of shoving model for non-Arrhenius temperature dependence viscous liquids’ relaxation time is experimentally accessible highfrequency plateau modulus, not idealized affine cannot be measured. Data a large selection metallic glasses are compared to three different versions model. The original shear-modulus based version shows slight correlation Poisson ratio, which eliminated by energy-landscape formulation in bulk plays minor role. © 2012 American Institute Physics .[ http://dx.doi.org/10.1063/1.4724102] I. INTRODUCTION In recent communication 1 Puosi and Leporini showed from computer simulations relevant high-frequency controlling corresponding deformations at truly infinite frequency. Rather, it referring scales on one hand much shorter than any time, but other longer typical vibration times. This confirms findings groups. 2–4 further proposed an extension allow heterogeneities new fits simulation data very well. consistent with previous works Khronik et al., who introduced idea distribution local moduli explain sub Tg relaxations within shoving-model framework. 5, 6