Onset of rigidty in glasses: from random to self-organized networks

Details Onset of rigidty in glasses: from random to self-organized networks Onset of rigidty in glasses: from random to self-organized networks

2006-09-28

arxiv.org/abs/cond-mat/0609732v1

Physics

Condensed Matter

Materials Science

27 pages, 6 figures, Proceedings of the Conference on Non-Crystalline Materials 10, to appear in Journal of Non-Crystalline So

Scientific paper

10.1016/j.jnoncrysol.2007.01.078

We review in this paper the signatures of a new elastic phase that is found in glasses with selected compositions. It is shown that in contrast with random networks, where rigidity percolates at a single threshold, networks that are able to self-organize to avoid stress will remain in an almost stress- free state during a compositional interval, an intermediate phase, that is bounded by a flexible phase and a stressed rigid phase. We report the experimental signatures and describe the theoretical efforts that have been accomplished to characterize the intermediate phase. We illustrate one of the methods used in more detail with the example of Group III chalcogenides and finally suggest further possible experimental signatures of self-organization.

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