Confined phonons in metallic superlattices: Raman study of Co/Ru
Confined phonons in metallic superlattices: Raman study of Co/Ru
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DOI：
10.1103/physrevlett.77.2025
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发表时间：
1996-09-02
影响因子：
8.6
通讯作者：
Peters, MJ
中科院分区：
文献类型：
--
作者：
Grimsditch, M;Mattson, JE;Peters, MJ
在一系列Co/Ru超晶格中测量了Ru的拉曼激活横光（TO）声子模。的TO振动的频率的变化，在框架内的限制声子的解释，是在很好的协议与公布的分散曲线从非弹性中子散射实验获得的散装钌。由于声子折叠或晶格应变效应的Ru TO模式的频率偏移的解释被排除的数据。
The Raman-active transverse-optic (TO) phonon mode of Ru was measured in a series of Co/Ru superlattices. The changes in the frequency of the TO vibration, interpreted within the framework of confined phonons, are in excellent agreement with published dispersion curves for bulk Ru obtained from inelastic neutron-scattering experiments. Interpretations of the frequency shifts of the Ru TO mode as due to phonon-folding or lattice-strain effects are ruled out by the data.