Rigidity and intermediate phases in glasses driven by speciation

Details Rigidity and intermediate phases in glasses driven by speciation Rigidity and intermediate phases in glasses driven by speciation

2006-03-31

arxiv.org/abs/cond-mat/0603855v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.74.184208

The rigid to floppy transitions and the associated intermediate phase in glasses are studied in the case where the local structure is not fully determined from the macroscopic concentration. The approach uses size increasing cluster approximations and constraint counting algorithms. It is shown that the location and the width of the intermediate phase and the corresponding structural, mechanical and energetical properties of the network depend crucially on the way local structures are selected at a given concentration. The broadening of the intermediate phase is obtained for networks combining a large amount of flexible local structural units and a high rate of medium range order.

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