R.W. Gammon, E. Courtens, et al.
Physical Review B
From Raman measurements on superconducting and non-superconducting YBa2Cu3O7-δ single crystals, we show that close to room temperature there is an unaccounted for, intense, oxygen vibrational mode at 598 cm-1. This (zz) polarized mode appears to arise from some chain oxygen atoms occupying another site in the crystal. Using laser heating and a shutter, we find that the time it takes to occupy or empty this site is less than 0.1 sec. If a charge carrier in the Cu-O plane induces the occupation of this new site, then a large electron-phonon coupling constant could result. © 1990.
R.W. Gammon, E. Courtens, et al.
Physical Review B
C.M. Brown, L. Cristofolini, et al.
Chemistry of Materials
T.N. Morgan
Semiconductor Science and Technology
J.H. Stathis, R. Bolam, et al.
INFOS 2005