Optical study of RE1+xBa2-xCu3O6 (RE = Nd, Sm) and YBa2Cu3O6 in the mid infrared range

被引：1
|
作者：
Barba, D [1 ]
Jandl, S
Martin, AA
Lin, CT
Cardona, M
Wolf, T
机构：
[1] Univ Sherbrooke, Dept Phys, Ctr Rech Proprietes Elect Mat Avances, Sherbrooke, PQ J1K 2R1, Canada
[2] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany
[3] Forschungszentrum Karlsruhe, Inst Festkorperphys, D-76021 Karlsruhe, Germany
[4] UNIVAP, Inst Pesquisa & Desenvolvimento, Sao Jose Dos Campos 12244000, SP, Brazil
来源：
EUROPEAN PHYSICAL JOURNAL B | 2001年 / 22卷 / 03期
关键词：
D O I：
10.1007/PL00011148
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Infrared reflectance. and transmission measurements as well as Raman scattering have been used to study the RE1+xBa2-xCu3O6 (RE = Nd, Sm) and YBa2Cu3O6 absorption bands in the 1100-1500 cm(-1) infrared range as a function of temperature and beam polarization. In addition to two-phonon absorption between 1100 and 1170 cm(-1), we observe excitations around 1400 cm(-1). occurring in oxygen rich enclosures within the samples, and assign them to an excitation involving two-phonons plus the 270 cm(-1) local mode related to Cu-O broken chains. Thus, the previously reported possible magnetic origin of the 1436 cm(-1) sharp absorption band in YBa2Cu3O6 is contested.
引用
收藏
页码：277 / 281
页数：5
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