AN INTERFACE EFFECT IN C-ORIENTED (Y PR)BA2CU3O7 SUPERLATTICES - RAMAN-SCATTERING BY FORBIDDEN PHONONS/

Authors
LI R FEILE R SHERMAN E ADRIAN H JAKOB G
Citation
R. Li et al., AN INTERFACE EFFECT IN C-ORIENTED (Y PR)BA2CU3O7 SUPERLATTICES - RAMAN-SCATTERING BY FORBIDDEN PHONONS/, Journal of physics and chemistry of solids, 58(3), 1997, pp. 379-383
Citations number
21
Categorie Soggetti
Physics, Condensed Matter",Chemistry
Journal title
Journal of physics and chemistry of solids → ACNP
ISSN journal
00223697
Volume
58
Issue
3
Year of publication
1997
Pages
379 - 383
Database
ISI
SICI code
0022-3697(1997)58:3<379:AIEIC(>2.0.ZU;2-9
Abstract
Raman results of ultrathin layer high T-c superlattices (Y-m/Pr-1)Ba2C u3O7 (m = 2, 3, 4) exhibit a common feature: new peaks, absent in the bulk compounds. These peaks are attributed to oxygen B-1u symmetry mod es confined in the YBa2Cu3O7 layers. To explain their Raman activity a mechanism based on the asymmetry of crystal field at Y-Pr layer inter faces is proposed. (C) 1997 Elsevier Science Ltd.