Abstract
The power-law frequency dependence of both the conductivity, (), and permittivity, (), of ion-conducting materials suggests that self-similar or scale-invariant behavior influences the transport of ions at high frequencies. Using an anomalous-diffusion model, we derive relevant power-law expressions for () and () and compare these with measurements performed on LiPO3 glass. Superior fits to the measured data are obtained compared to the commonly used Kohlrausch-Williams-Watts (KWW) description of the electrical modulus, most particularly in the notorious high-frequency regime. Evaluation of our results in terms of an anomalous-diffusion model suggests the dominance of interaction-based constraints to diffusion.
Original language | English (US) |
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Pages (from-to) | 2770-2776 |
Number of pages | 7 |
Journal | Physical Review B |
Volume | 51 |
Issue number | 5 |
DOIs | |
State | Published - 1995 |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics