OPTICAL-MODE SOFTENING IN THE INCOMMENSURATE PHASE OF SR2NB2O7

被引：34

作者：

KOJIMA, S ^{[1
]}

TAKASHIGE, M ^{[1
]}

NAKAMURA, T ^{[1
]}

KAKINUMA, H ^{[1
]}

机构：

[1] WASEDA UNIV,SCH SCI & ENGN,TOKYO 160,JAPAN

来源：

SOLID STATE COMMUNICATIONS | 1979年 / 31卷 / 10期

关键词：

D O I：

10.1016/0038-1098(79)90783-X

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

In the incommensurate phase below about 220°C of Sr2Nb2O7, the soft mode, of which frequency decreases toward 215°C has been found by the Raman scattering measurements in the b(cc)b scattering geometry. The level repulsion and the intensity transfer between the soft mode and another low frequency mode are clearly observed. The uncoupled soft mode frequency ωs has been found to be expressed as ωs =A(Ttr-T)β, where β= 0.38 ± 0.02. Pressure dependence of the soft mode has also been measured up to 24kbar. No remarkable pressure dependence has been observed. © 1979.

引用

页码：755 / 757

页数：3

共 5 条

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[J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1979, 46 (04) : 1387 - 1388
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