Dynamic Central Peaks in a Crystalline Solid: KTaO3
Dynamic Central Peaks in a Crystalline Solid: KTaO3
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晶体固体中的动态中心峰：KTaO3
DOI：
10.1103/physrevlett.37.161
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发表时间：
1976
影响因子：
8.6
通讯作者：
P. Fleury
中科院分区：
文献类型：
--
作者：
K. Lyons;P. Fleury
利用计算机辅助归一化程序和共振重吸收技术，可以在0 ~ 3cm−1范围内对ktao3准弹性光散射光谱中的两个中心峰进行频率分辨。线宽的强度、极化、温度、电场和角依赖性表明，窄分量（直角散射在300 K时为2.3±0.3 GHz）是由熵波动引起的。初步确定了双声子过程的宽组分。
Use of a computer-assisted normalization procedure and a resonant reabsorption technique has permitted frequency resolution of two central peaks in the quasielastic-light-scattering spectrum of KTa O 3 in the 0 to 3 cm− 1 range. The intensities, and the polarization, temperature, electric field, and angular dependences of the linewidths indicate that the narrow component (2.3±0.3 GHz at 300 K in right-angle scattering) is due to entropy fluctuations. A tentative identification of the broader component with two-phonon processes is made.