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oai:docta.ucm.es:20.500.14352/1167162025-03-18T15:24:20Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Seoane Bartolomé, Beatriz author Zamponi, Francesco author 2018 Motivated by the mean field prediction of a Gardner phase transition between a "normal glass" and a "marginally stable glass", we investigate the off-equilibrium dynamics of three-dimensional polydisperse hard spheres, used as a model for colloidal or granular glasses. Deep inside the glass phase, we find that a sharp crossover pressure PG separates two distinct dynamical regimes. For pressure P < P-G, the glass behaves as a normal solid, displaying fast dynamics that quickly equilibrate within the glass free energy basin. For P > P-G, instead, the dynamics become strongly anomalous, displaying very large equilibration timescales, aging, and a constantly increasing dynamical susceptibility. The crossover at P-G is strongly reminiscent of the one observed in three-dimensional spin-glasses in an external field, suggesting that the two systems could be in the same universality class, consistent with theoretical expectations. B. Seoane and F. Zamponi, Soft Matter, 2018, 14, 5222–5234. 1744-683X 10.1039/C8SM00859K https://hdl.handle.net/20.500.14352/116716 1744-6848 https://doi.org/10.1039/C8SM00859K https://pubs.rsc.org/en/content/articlelanding/2018/sm/c8sm00859k https://arxiv.org/pdf/1803.05031 Spin-glass-like aging in colloidal and granular glasses