Two contributions to the ac conductivity of alkali oxide glasses

D. L. Sidebottom, P. F. Green, R. K. Brow

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Although the frequency dependent conductivity of ion-containing glasses often displays scale invariant power law dispersion at high temperatures, the exponent increases to unity at lower temperatures. We report measurements of the conductivity of a series of alkali metaphosphate glasses including a mixed alkali composition and demonstrate that this temperature dependence results from the superposition of two power law dispersions originating from separate mechanism, and does not indicate any intrinsic change in scaling of the process which dominates at high temperatures.

Original languageEnglish (US)
Pages (from-to)5068-5071
Number of pages4
JournalPhysical Review Letters
Issue number25
StatePublished - 1995
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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