RAMAN-STUDY OF UNTWINNED YBA2CU3O7 SINGLE-CRYSTALS - NEW EVIDENCE FORTHE X-Y ANISOTROPY OF THE SUPERCONDUCTING GAP

Authors
LIMONOV MF RYKOV AI TAJIMA S
Citation
Mf. Limonov et al., RAMAN-STUDY OF UNTWINNED YBA2CU3O7 SINGLE-CRYSTALS - NEW EVIDENCE FORTHE X-Y ANISOTROPY OF THE SUPERCONDUCTING GAP, Physica. C, Superconductivity, 282, 1997, pp. 1029-1030
Citations number
6
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
282
Year of publication
1997
Part
2
Pages
1029 - 1030
Database
ISI
SICI code
0921-4534(1997)282:<1029:ROUYS->2.0.ZU;2-0
Abstract
We present a new picture of Raman scattering in YBa2Cu3O7 single cryst als which shows both the out-of-plane and the in-plane anisotropies of the electron-phonon interactions. The x-y anisotropy in the softening and the broadening for the 340 cm(-1) mode strongly suggests the anis otropy of the superconducting gap amplitude Delta(x) not equal Delta(y ) which leads to the d+s symmetry of the gap wave function.