Rigidity and intermediate phases in glasses driven by speciation

Abstract

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.

4 pages, 4 figures

References in corpus (3)

• Pressure Raman effects and internal stress in network glasses
• Self-organization with equilibration: a model for the intermediate phase in rigidity percolation
• Simulation of the physical properties of the chalcogenide glass As${}_2$S${}_3$ using a density-functional-based tight-binding method

Cited by in corpus (2)

• Onset of rigidty in glasses: from random to self-organized networks
• Abrupt boundaries of intermediate phases and space filling in oxide glasses