INTERACTING BROWNIAN PARTICLES AND CORRELATIONS IN SUPERIONIC CONDUCTORS

被引：49

作者：

GEISEL, T

机构：

[1] Xerox Palo Alto Research Center, Palo Alto

[2] FB Physik, Universitaet Regensburg

来源：

PHYSICAL REVIEW B | 1979年 / 20卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.20.4294

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The role of correlations in superionic conductors is studied in a model of interacting Brownian particles in a periodic potential. A general expression for the ac and dc conductivity is derived and applied to potentials of the Frenkel-Kontorova type with two different periods. The dc conductivity exhibits an oscillatory behavior as a function of the concentration of mobile ions. The absolute maximum of the conductivity of one-dimensional ionic conductors is predicted to occur for concentrations of about 0.75-0.8 ions per well. The model is applied to K-Hollandite for a quantitative analysis of the transport mechanism, showing up short-range correlations rather than collective excitations. © 1979 The American Physical Society.

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页码：4294 / 4302

页数：9

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