Figure 5

Figure 5: “Dynamic scaling” relation between the number of dynamically correlated particles, evaluated by the peak height of χ4, and relaxation timescale, τα, for a number of glass-formers [36], determined using the bound provided by Eq. (7). For all systems, dynamic correlations increase when the glass transition is approached. The full line through the data [36] suggests a crossover from algebraic, χ4ταz, to logarithmic, χ4∼exp(ταψ), growth of dynamic correlations with increasing τα.