A QUASI-ELASTIC LIGHT-SCATTERING STUDY OF THE 1Q TO 2Q TRANSITION WITHIN THE INCOMMENSURATE PHASE OF BA2NANB5O15

被引：13

作者：

OLIVER, WF ^{[1
]}

SCOTT, JF ^{[1
]}

LEE, SA ^{[1
]}

LINDSAY, SM ^{[1
]}

机构：

[1] UNIV COLORADO,DEPT PHYS,BOULDER,CO 80309

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1990年 / 2卷 / 10期

关键词：

D O I：

10.1088/0953-8984/2/10/016

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Inelastic light scattering in incommensurate (IC) Ba2NaNb 5O15 reveals a dynamic central mode whose width satisfies tau -1(q,T)=D(T)q2 with diffusivity D(T) exhibiting a maximum of 0.85 cm2 s-1 at TR approximately=565 K, the temperature at which electron microscopy shows an abrupt roughening transition within the antiphase boundaries (APBs). This phase change involves a transition from modulation along one axis (1q) to modulation along two orthogonal axes (2q). The dynamic central mode is also observed to couple strongly with the (100) longitudinal acoustic (LA) phonon.

引用

页码：2465 / 2471

页数：7

共 34 条

[1] DIRECT NEUTRON OBSERVATION OF A SINGLE-Q INCOMMENSURATE PHASE OF QUARTZ AT ZERO STRESS [J].