RELAXATION DUE TO INCOHERENT TUNNELING IN DIELECTRIC GLASSES

被引：17

作者：

NEU, P

WURGER, A

机构：

[1] Institut für Theoretische Physik Universität Heidelberg, Heidelberg, 69120

来源：

EUROPHYSICS LETTERS | 1994年 / 27卷 / 06期

关键词：

D O I：

10.1209/0295-5075/27/6/008

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A new relaxation mechanism is shown to arise from overdamped two-level systems above a critical temperature T* almost-equal-to 5 K, thus yielding an explanation for experimental observations in dielectric glasses in the temperature range below the relaxation peak. Using the distribution function of the tunnelling model for the parameters of the two-level systems, both the linear decrease of the sound velocity and the linear increase of the absorption up to the relaxation maximum, are quantitatively accounted for by our theory.

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页码：457 / 462

页数：6

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