Dynamic heterogeneities above and below the mode-coupling temperature: evidence of a dynamic crossover.

@article{Flenner2013DynamicHA,
  title={Dynamic heterogeneities above and below the mode-coupling temperature: evidence of a dynamic crossover.},
  author={Elijah J Flenner and Grzegorz Szamel},
  journal={The Journal of chemical physics},
  year={2013},
  volume={138 12},
  pages={12A523}
}
We examine dynamic heterogeneities in a model glass-forming fluid, a binary harmonic sphere mixture, above and below the mode-coupling temperature T(c). We calculate the ensemble independent susceptibility χ4(τ(α)) and the dynamic correlation length ξ4(τ(α)) at the α-relaxation time τ(α). We also examine in detail the temperature dependence of τ(α) and the diffusion coefficient D. For higher temperatures, we find that the standard Stokes-Einstein relationship, D∼τ(α)(-1), holds, but at lower… CONTINUE READING
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