LIGHT-SCATTERING IN A (Y PR)BA2CU3O7 SUPERLATTICE AND THE INTENSITY OF A NEW RAMAN-ACTIVE PHONON/

Authors
LI R SHERMAN E FEILE R ADRIAN H JAKOB G HAHN T
Citation
R. Li et al., LIGHT-SCATTERING IN A (Y PR)BA2CU3O7 SUPERLATTICE AND THE INTENSITY OF A NEW RAMAN-ACTIVE PHONON/, Physica. C, Superconductivity, 242(1-2), 1995, pp. 46-54
Citations number
26
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
242
Issue
1-2
Year of publication
1995
Pages
46 - 54
Database
ISI
SICI code
0921-4534(1995)242:1-2<46:LIA(PS>2.0.ZU;2-A
Abstract
In this paper we report Raman results from a high-quality c oriented u ltra-thin layer (YBa2Cu3O7)(2)/(PrBa2Cu3O7)(1) superconducting superla ttice. In addition to bulk-like modes a new line is observed at a low temperature in the region around 320 cm(-1) which is interpreted as or iginating from the antiphase combination of original IR active B-lu ph onons in individual YBa2Cu3O7 layers. We explain the Raman intensity o f such a combined IR mode proposing the mixing of normal vectors and a n asymmetric crystal field at Y-Pr interfaces.