Compressing nearly hard sphere fluids increases glass fragility

We use molecular dynamics to investigate the glass transition occurring at large volume fraction, φ, and low temperature, T, in assemblies of soft repulsive particles. We find that equilibrium dynamics in the (φ, T)-plane obey a form of dynamic scaling in the proximity of a critical point at T=0 and φ=φ0, which should correspond to the ideal glass transition of hard spheres. This glass point, “point G", is distinct from athermal jamming thresholds. A remarkable consequence of scaling behaviour is that the dynamics at fixed φ passes smoothly from that of a strong glass to that of a very fragile glass as φ increases beyond φ0. Correlations between fragility and various physical properties are explored.

• Publication year

  2008

• Venue

  EPL (Europhysics Letters)

• Publication date

  2008-10-24

• Fields of study

  Physics

• Identifiers
  DOI 10.1209/0295-5075/86/10001arXiv 0810.4405
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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