Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
1999-07-30
Phys. Rev. Lett. 84, 310 (2000).
Physics
Condensed Matter
Disordered Systems and Neural Networks
5 pages, 5 figures, Rev-tex
Scientific paper
10.1103/PhysRevLett.84.310
Recent scaling results for the AC conductivity of ionic glasses by Roling et al. [Phys. Rev. Lett. vol 78, 2160 (1997)] and Sidebottom [Phys. Rev. Lett. vol 82, 3653 (1999)] are discussed. It is shown that Sidebottom's version of scaling is completely general. A new analytical approximation to the universal AC conductivity of hopping in the extreme disorder limit, the ``diffusion cluster approximation,'' is presented and compared to simulations and experiments.
Dyre Jeppe C.
Schroeder Thomas B.
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