RAMAN-ACTIVE PHONONS IN R2 BACUO5 (R = LA, ND)

被引：8
作者：
ABRASHEV, MV [1 ]
ZLATEVA, GA [1 ]
DINOLOVA, E [1 ]
机构：
[1] INST APPL MINERAL,BU-1000 SOFIA,BULGARIA
来源：
PHYSICAL REVIEW B | 1993年 / 47卷 / 13期
关键词：
D O I：
10.1103/PhysRevB.47.8320
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The polarized Raman spectra of tetragonal La2BaCuO5 and Nd2BaCuO5 have been measured in various scattering configurations. The Raman lines corresponding to (3A1g + 1B1g + 3B2g + 3Eg) Raman-active modes expected for the P4/mbm structure have been observed. It has been found that the A1g and B2g modes, arising as Davydov's partners from the internal stretching vibrations of oxygen within the CuO4 structural units, have the same frequencies. This justifies the molecular-site group analysis used parallel to the factor-group analysis to assign the particular phonon lines to definite atomic vibrations.
引用
收藏
页码：8320 / 8323
页数：4
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