Abstract
The dielectric response of many materials exhibits universal behavior in the form of a power law frequency dependence of the ac conductivity. This response is seen in all types of structures both crystalline and amorphous and for all types of polarizing species including dipoles and ions. Here I demonstrate that for ionic materials the power law exponent decreases with decreasing dimensionality of the ion conduction pathways. Although percolation concepts such as random walks on a self-similar fractal lattice provide a qualitative explanation, experimental findings instead indicate that the dispersion is the result of localized ion motion occurring on an atomic length scale.
| Original language | English |
|---|---|
| Pages (from-to) | 983-986 |
| Number of pages | 4 |
| Journal | Physical Review Letters |
| Volume | 83 |
| Issue number | 5 |
| State | Published - Aug 2 1999 |
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
Cite this
Dimensionality dependence of the conductivity dispersion in ionic materials. / Sidebottom, David L.
In: Physical Review Letters, Vol. 83, No. 5, 02.08.1999, p. 983-986.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Dimensionality dependence of the conductivity dispersion in ionic materials
AU - Sidebottom, David L.
PY - 1999/8/2
Y1 - 1999/8/2
N2 - The dielectric response of many materials exhibits universal behavior in the form of a power law frequency dependence of the ac conductivity. This response is seen in all types of structures both crystalline and amorphous and for all types of polarizing species including dipoles and ions. Here I demonstrate that for ionic materials the power law exponent decreases with decreasing dimensionality of the ion conduction pathways. Although percolation concepts such as random walks on a self-similar fractal lattice provide a qualitative explanation, experimental findings instead indicate that the dispersion is the result of localized ion motion occurring on an atomic length scale.
AB - The dielectric response of many materials exhibits universal behavior in the form of a power law frequency dependence of the ac conductivity. This response is seen in all types of structures both crystalline and amorphous and for all types of polarizing species including dipoles and ions. Here I demonstrate that for ionic materials the power law exponent decreases with decreasing dimensionality of the ion conduction pathways. Although percolation concepts such as random walks on a self-similar fractal lattice provide a qualitative explanation, experimental findings instead indicate that the dispersion is the result of localized ion motion occurring on an atomic length scale.
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UR - http://www.scopus.com/inward/citedby.url?scp=0001497264&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0001497264
VL - 83
SP - 983
EP - 986
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 5
ER -