Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
, 41 (8), 90

Power Law Relationship Between Diffusion Coefficients in Multi-Component Glass Forming Liquids


Power Law Relationship Between Diffusion Coefficients in Multi-Component Glass Forming Liquids

Anshul D S Parmar et al. Eur Phys J E Soft Matter.


The slow down of dynamics in glass forming liquids as the glass transition is approached has been characterised through the Adam-Gibbs relation, which relates relaxation time scales to the configurational entropy. The Adam-Gibbs relation cannot apply simultaneously to all relaxation times scales unless they are coupled, and exhibit closely related temperature dependences. The breakdown of the Stokes-Einstein relation presents an interesting situation to the contrary, and in analysing it, it has recently been shown that the Adam-Gibbs relation applies to diffusion coefficients rather than to viscosity or structural relaxation times related to the decay of density fluctuations. However, for multi-component liquids --the typical cases considered in computer simulations, metallic glass formers, etc.-- such a statement raises the question of which diffusion coefficient is described by the Adam-Gibbs relation. All diffusion coefficients can be consistently described by the Adam-Gibbs relation if they bear a power law relationship with each other. Remarkably, we find that for a wide range of glass formers, and for a wide range of temperatures spanning the normal and the slow relaxation regimes, such a relationship holds. We briefly discuss possible rationalisations of the observed behaviour.

Keywords: Flowing Matter: Liquids and Complex Fluids.

Similar articles

See all similar articles


    1. J Chem Phys. 2004 Oct 15;121(15):7347-54 - PubMed
    1. J Chem Phys. 2013 Oct 28;139(16):164502 - PubMed
    1. Phys Rev Lett. 1990 Sep 24;65(13):1595-1598 - PubMed
    1. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 1993 Jul;48(1):207-213 - PubMed
    1. Phys Rev Lett. 2017 Aug 4;119(5):056001 - PubMed

LinkOut - more resources