ISSN:
1434-6036
Keywords:
PACS. 74.72.Jt Other cuprates – 74.25.Gz Optical properties – 74.25.Ha Magnetic properties – 71.55.Ht Other nonmetals
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: 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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/PL00011148
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