Quasi-Debye response of ion-hopping conduction at lowest frequencies

被引：31

作者：

Ishii, T ^{[1
]}

Abe, T ^{[1
]}

Shirai, H ^{[1
]}

机构：

[1] Okayama Univ, Fac Engn, Dept Mech Engn, Okayama 7008530, Japan

来源：

SOLID STATE COMMUNICATIONS | 2003年 / 127卷 / 11期

关键词：

quasi-Debye response; non-Debye relaxation; relaxation modes; universality of frequency exponents; anomalous conductivity;

D O I：

10.1016/S0038-1098(03)00556-8

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

On the basis of the relaxation mode theory, quasi-Debye response in the dynamic conductivity by hopping ions is theoretically investigated in three-dimensional random lattices with a uniform distribution of activation energies. It is shown at lowest frequencies that the dynamic conductivity is approximately given by σ(ω) ∼ σ(0) + A″ω s″, s″ = 2 - n, where n is a non-integer exponent originated from the mode diffusion length and density of states. The numerical analyses give rise to some values of s″ < 2, for example s″ ∼ 1.5, which behaves as s″ → 2 with increasing temperature. © 2003 Elsevier Ltd. All rights reserved.

引用

页码：737 / 741

页数：5