SOFT VIBRATIONAL-MODE IN LINBO3 AND LITAO3

被引：58

作者：

SERVOIN, JL ^{[1
]}

GERVAIS, F ^{[1
]}

机构：

[1] UNIV ORLEANS,VER SCI FONDAMENTALES & APPL,F-45045 ORLEANS,FRANCE

来源：

SOLID STATE COMMUNICATIONS | 1979年 / 31卷 / 05期

关键词：

D O I：

10.1016/0038-1098(79)90562-3

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The temperature dependence of the far-infrared reflectivity as obtained with a scanning interferometer for the A1- and E-type modes of both LiNbO3 and LiTaO3 is reported in the ferroelectric phase. Results of a Kramers-Kronig analysis are compared with Raman and neutron scattering data which are controversial about the existence of a soft vibrational mode. For LiTaO3, spectra are obtained 300 K above the Curie temperature, in the paraelectric phase. The lowest-frequency A1 (TO) mode is unambiguously found as soft and becomes rapidly overdamped. © 1979.

引用

页码：387 / 391

页数：5

共 20 条

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