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

Authors
Barba, D Jandl, S Martin, AA Lin, CT Cardona, M Wolf, T
Citation
D. Barba et al., Optical study of RE1+xBa2-xCu3O6 (RE = Nd, Sm) and YBa2Cu3O6 in the mid infrared range, EUR PHY J B, 22(3), 2001, pp. 277-281
Citations number
34
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
EUROPEAN PHYSICAL JOURNAL B
ISSN journal
14346028 → ACNP
Volume
22
Issue
3
Year of publication
2001
Pages
277 - 281
Database
ISI
SICI code
1434-6028(200108)22:3<277:OSOR(=>2.0.ZU;2-J
Abstract
Infrared reflectance. and transmission measurements as well as Raman scatte ring have been used to study the RE1+xBa2-xCu3O6 (RE = Nd, Sm) and YBa2Cu3O 6 absorption bands in the 1100-1500 cm(-1) infrared range as a function of temperature and beam polarization. In addition to two-phonon absorption bet ween 1100 and 1170 cm(-1), we observe excitations around 1400 cm(-1). occur ring in oxygen rich enclosures within the samples, and assign them to an ex citation 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.