INTERBAND ELECTRON-PHONON COUPLING IN YBA2CU3O7-X - THE B-1G PHONON RAMAN-SCATTERING AND PLANE OXYGEN IONS INTERACTION

Authors
SHERMAN E LI R FEILE R
Citation
E. Sherman et al., INTERBAND ELECTRON-PHONON COUPLING IN YBA2CU3O7-X - THE B-1G PHONON RAMAN-SCATTERING AND PLANE OXYGEN IONS INTERACTION, Solid state communications, 94(10), 1995, pp. 851-855
Citations number
16
Categorie Soggetti
Physics, Condensed Matter
Journal title
Solid state communications → ACNP
ISSN journal
00381098
Volume
94
Issue
10
Year of publication
1995
Pages
851 - 855
Database
ISI
SICI code
0038-1098(1995)94:10<851:IECIY->2.0.ZU;2-O
Abstract
We investigate the interband electron-phonon coupling in YBa2Cu3O7-x, and show that it is important for the Raman intensity of the B-1g phon on and for the interaction between the O2 and O3 ions. In the Raman sc attering this interaction leads to a new mechanism for the Raman activ ity of the B-1g phonon that explains the experimentally observed ratio of Raman intensities for the two plane vibrations in z(xx + yy)(z) ov er bar geometry. In addition, a charge transfer between the plane oxyg en ions due to this interaction causes a slight hardening of the frequ ency of the B-1g vibration.