Experimental evidence for rotated tetrahedra as tunneling states in neutron-irradiated quartz

被引：0
|
作者：
Laermans, C
Keppens, V
机构：
[1] Laboratorium voor Halfgeleiderfysica, Katholieke Universiteit Leuven, B-3001 Leuven
来源：
PHYSICA B-CONDENSED MATTER | 1996年 / 219-20卷
关键词：
D O I：
10.1016/0921-4526(95)00712-1
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Ultrasonic attenuation measurements are carried out in neutron-irradiated z-cut quartz and are analyzed in the framework of the tunneling model. It was previously derived that the coupling between the tunneling states and the longitudinal phonons behaves anisotropically. The observed increase in the anisotropy with the dose is explained in this paper in terms of the relative contribution of the tunneling states in the 'crystalline' and 'amorphous' part of the samples.
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收藏
页码：258 / 260
页数：3
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