Correlation of the scaling exponent gamma of the diffusivity-density function in viscous liquids with their elastic properties

Anthony N Papathanassiou; Ilias Sakellis

doi:10.1063/1.3382645

Correlation of the scaling exponent gamma of the diffusivity-density function in viscous liquids with their elastic properties

J Chem Phys. 2010 Apr 21;132(15):154503. doi: 10.1063/1.3382645.

Authors

Anthony N Papathanassiou¹, Ilias Sakellis

Affiliation

¹ Department of Physics, Solid State Physics Section, University of Athens, Panepistimiopolis, 15784 Zografos, Athens, Greece. antpapa@phys.uoa.gr

PMID: 20423185
DOI: 10.1063/1.3382645

Abstract

Fundamental thermodynamical concepts and a solid-state point defect elastic model are used to formulate a diffusivity-density scaling function for viscous liquids. It is proved in a straightforward manner that the scaling exponent gamma describing the density scaling of the diffusivity is related with the pressure derivative of the isothermal bulk modulus.