Fast-ion conduction and flexibility of glassy networks.
We observe two thresholds in the variations of electrical conductivity of dry (AgI)_{x}(AgPO3)_{1-x} solid electrolyte glasses, when the AgI additive concentration x increases to 9.5% and to 37.8%. Raman scattering complemented by calorimetric measurements confirms 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.
Department of Electrical and Computer Engineering, University of Cincinnati, Cincinnati, OH 45221-0030, USA.
Deassy I
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Novita
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P
Boolchand
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Malki
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Micoulaut
D004553:Electric Conductivity; D004573:Electrolytes / Q000737:chemistry*; D044367:Phase Transition; D018583:Pliability; D018030:Silver Compounds / Q000737:chemistry*; D013059:Spectrum Analysis, Raman
D004573:Electrolytes; D018030:Silver Compounds