Fast-ion conduction and flexibility of glassy networks

Details Fast-ion conduction and flexibility of glassy networks Fast-ion conduction and flexibility of glassy networks

2007-09-27

arxiv.org/abs/0709.4430v1

Physics

Condensed Matter

Soft Condensed Matter

Accepted by PRL

Scientific paper

10.1103/PhysRevLett.98.195501

We observe two thresholds in the variations of electrical conductivity of dry solid electrolyte (AgI)x(AgPO3)1-x glasses, when the AgI additive concentration x increases to 9.5% and to 37.8%. Raman scattering complemented by calorimetric measurements confirm that these thresholds are signatures of the rigidity phase transitions; at x = 9.5% from a stressed rigid to an isostatically (stress free) rigid phase, and at x = 37.8% from isostatically rigid to a flexible phase. In the flexible phase, the electrical conductivity seems to increase as a power of x, this is in good agreement with the theoretical prediction based on 3d percolation.

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