Scaling and Universality of ac Conduction in Disordered Solids
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Open Access
- 10 January 2000
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 84 (2) , 310-313
- https://doi.org/10.1103/physrevlett.84.310
Abstract
Recent scaling results for the ac conductivity of ionic glasses by Roling et al. [Phys. Rev. Lett. 78, 2160 (1997)] and Sidebottom [Phys. Rev. Lett. 82, 3653 (1999)] are discussed. We prove that Sidebottom's version of scaling is completely general. A new approximation to the universal ac conductivity arising in the extreme disorder limit of the symmetric hopping model, the “diffusion cluster approximation,” is presented and compared to computer simulations and experiments.Keywords
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