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Related Experiment Videos

Self-organization with equilibration: a model for the intermediate phase in rigidity percolation.

M V Chubynsky1, M-A Brière, Normand Mousseau

  • 1Département de Physique, Université de Montréal, C.P. 6128, Succursale Centre-ville, Montréal, Québec, Canada H3C 3J7. mykyta.chubynsky@umontreal.ca

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|August 16, 2006
PubMed
Summary

A new model reveals an intermediate phase in covalent glasses where both rigid and floppy networks coexist. This self-organized phase, near the rigidity percolation threshold, may be common in stressed glass networks.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Network Theory

Background:

  • Experimental results suggest an intermediate phase in covalent glasses due to network self-organization and stress minimization.
  • The precise nature of this experimentally observed phase remains elusive.
  • Understanding this phase is crucial for predicting glass properties.

Purpose of the Study:

  • To investigate the nature of the intermediate phase in covalent glasses.
  • To model the self-organization of glass networks and their stress-minimizing behavior.
  • To explore the coexistence of rigid and floppy network structures.

Main Methods:

  • Modification of a prior self-organization model.
  • Generation of uniform sampling of stress-free networks.

Related Experiment Videos

  • Study of a diluted triangular lattice model and comparison with Bethe lattice models.

    • Main Results:

    • An unusual intermediate phase was observed in the modified model.
    • This phase allows for the co-occurrence of both rigid and floppy network configurations.
    • Bond-configurational entropy of self-organized networks is only ~2% lower than random networks.

    Conclusions:

    • The self-organized intermediate phase, characterized by coexisting rigid and floppy networks, is a significant finding.
    • This phase could be prevalent in systems approaching the rigidity percolation threshold.
    • The findings provide a clearer understanding of network self-organization in covalent glasses.