ArticleProceedings of the National Academy of Sciences of the United States of America2020
Experimental observation of the marginal glass phase in a colloidal glass.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed.
- Dynamic Gardner cross-over in a simple glass.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
- Johari-GoldsteinProceedings of the National Academy of Sciences of the United States of America · 2023Article
- Experimental observations of marginal criticality in granular materials.Proceedings of the National Academy of Sciences of the United States of America · 2022Article
- Determining the nonequilibrium criticality of a Gardner transition via a hybrid study of molecular simulations and machine learning.Proceedings of the National Academy of Sciences of the United States of America · 2021Article
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2 authors.
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Abstract
The replica theory of glasses predicts that in the infinite dimensional mean field limit, there exist two distinct glassy phases of matter: stable glass and marginal glass. We have developed a technique to experimentally probe these phases of matter using a colloidal glass. We avoid the difficulties inherent in measuring the long time behavior of glasses by instead focusing on the very short time dynamics of the ballistic to caged transition. We track a single tracer particle within a slowly densifying glass and measure the resulting mean squared displacement (MSD). By analyzing the MSD, we find that upon densification, our colloidal system moves through several states of matter. At lowest densities, it is a subdiffusive liquid. Next, it behaves as a stable glass, marked by the appearance of a plateau in the MSD whose magnitude shrinks with increasing density. However, this shrinking plateau does not shrink to zero; instead, at higher densities, the system behaves as a marginal glass, marked by logarithmic growth in the MSD toward that previous plateau value. Finally, at the highest experimental densities, the system returns to the stable glass phase. This provides direct experimental evidence for the existence of a marginal glass in three dimensions.
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