Low frequency elastic properties of neutron-irradiated quartz. Comparison with glasses

被引：8

作者：

Classen, J

Rohr, I

Enss, C

Hunklinger, S

Laermans, C

机构：

[1] Univ Heidelberg, Inst Angew Phys, D-69120 Heidelberg, Germany

[2] Katholieke Univ Leuven, Dept Phys, B-3001 Louvain, Belgium

来源：

EUROPEAN PHYSICAL JOURNAL B | 1999年 / 10卷 / 04期

关键词：

D O I：

10.1007/s100510050894

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Neutron-irradiated quartz is a promising model system to learn more about the low-energy excitations (tunneling states) in vitreous silica and in similar glasses. We present the first systematic study of the elastic properties of neutron-irradiated quartz at low frequencies and very low temperatures. Using the vibrating reed technique at frequencies of several kHz we have measured the sound velocity and internal friction of six quartz crystals irradiated with different neutron doses over a wide range of temperatures (7 mK-300 K). The results are analyzed using the tunneling model and several extensions of this theory. Comparisons are made with recent low-frequency measurements on normal and compacted vitreous silica and with ultrasound experiments on neutron-irradiated quartz.

引用

页码：623 / 633

页数：11