Effects of reduced dimensionality in the relaxation dynamics of ionic conductors

被引：4

作者：

Castro, M ^{[1
]}

Rivera, A

García-Barriocanal, J

Domínguez-Adame, F

Belous, AG

Santamaría, J

León, C

机构：

[1] Univ Pontificia Comillas, GISC, Escuela Tecn Super Ingn, ICAI, Madrid 28015, Spain

[2] Univ Complutense, Dept Fis Aplicada 3, GFMC, E-28040 Madrid, Spain

[3] Univ Complutense, Dept Fis Mat, GISC, E-28040 Madrid, Spain

[4] Ukrainian Acad Sci, Inst Inorgan Chem, UA-252680 Kiev, Ukraine

来源：

EUROPHYSICS LETTERS | 2005年 / 69卷 / 05期

关键词：

D O I：

10.1209/epl/i2004-10419-7

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the dispersive ionic conductivity in Li0.5-xNaxLa0.5TiO3 (0 <= x <= 0.5), where the number of available positions for the mobile Li ions is reduced by introducing immobile Na ions. At high frequency the conductivity is power law dependent with an exponent which increases as the number of accessible neighboring sites decreases. This result is quantitatively accounted for in terms of a one-parameter statistical microscopic model. We provide experimental and theoretical evidence for the importance of reduced dimensionality resulting from the blocked pathways in slowing down the dynamics of diffusing ions.

引用

页码：770 / 776

页数：7

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