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Simple clues and rules for self-organized rigidity in glasses

M. MICOULAUT1,*

Affiliation

  1. Laboratoire de Physique Théorique de la Matière Condensée, Université Pierre et Marie Curie, Boite 121 4, Place Jussieu, 75252 Paris Cedex 05, France

Abstract

new elastic phase has been recently discovered in glasses of selected compositions. This new phase is found in the vicinity of the network mean coordination number r =2.4 that marks the onset of rigidity in a glassy network with increasing connectivity. Here, it is shown that in contrast with random networks where rigidity percolates at the single threshold of r =2.4, networks that are able to self-organize to avoid stressed rigid local bonding will remain in an almost stress-free state during a compositional interval, an intermediate phase (or Boolchand phase), that is bounded by a flexible phase and a stressed rigid phase. The details of the theoretical construction are given for Ge-Se or Ge-Te systems..

Keywords

Self-organization, Rigidity, Glasses, Ge-Se, Ge-Te.

Submitted at: Oct. 8, 2007
Accepted at: Oct. 15, 2007

Citation

M. MICOULAUT, Simple clues and rules for self-organized rigidity in glasses, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 10, pp. 3235-3240 (2007)