SUBSTITUTION OF PR FOR Y IN YBA2CU4O8 AND YBA2CU3.5O7.5-DELTA SUPERCONDUCTORS - PHONON MODES AND CHARGE-TRANSFER EFFECTS

Authors
LITVINCHUK AP KALL M BORJESSON L BERASTEGUI P JOHANSSON LG
Citation
Ap. Litvinchuk et al., SUBSTITUTION OF PR FOR Y IN YBA2CU4O8 AND YBA2CU3.5O7.5-DELTA SUPERCONDUCTORS - PHONON MODES AND CHARGE-TRANSFER EFFECTS, Journal of physics and chemistry of solids, 56(12), 1995, pp. 1833-1833
Citations number
1
Categorie Soggetti
Physics, Condensed Matter",Chemistry
Journal title
Journal of physics and chemistry of solids → ACNP
ISSN journal
00223697
Volume
56
Issue
12
Year of publication
1995
Pages
1833 - 1833
Database
ISI
SICI code
0022-3697(1995)56:12<1833:SOPFYI>2.0.ZU;2-F
Abstract
We report on a Raman scattering study of (YxPr1-x)(2)Ba4Cu6+nO14+n-del ta (n = 1, 2) superconductors with 0 less than or equal to x less than or equal to 1 in the temperature range 10-300 K. The observed changes of the phonon frequencies, including the double chain modes, with Pr- content x in general follow from the variations of the bond distances. The apex-oxygen mode is, however, found to exhibit stronger variation with x in single (n = 0) then in double-chain (n = 1, 2) materials, w hich may indicate charge redistribution effects between chains and pla nes.