Attractive glasses dynamical heterogeneities

Zhang, Z. et al. 2011. Cooperative rearrangement regions and dynamical heterogeneities in colloidal glasses with attractive versus repulsive interactions. Phys. Rev. Lett. 107, 208303. 

At the particle level, the system is heterogeneous, both structurally and dynamically. Structural heterogeneities are caused by the local clustering induced by the bonds that open up holes in the elsewhere system—different mobilities are thus observed for particles in different environments. These dynamical heterogeneities are more dramatic in attraction-driven glasses than in repulsion-driven ones, but are absent in MCT, what poses an interesting dichotomy. 

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