Abstract
The phonon Raman spectra of Bi2Sr2Can-1CunO2n+4d (n = 1,2,3), high-Tc superconductors have been investigated in a number of single-crystal and polycrystalline samples. From the polarization and doping dependence, and from a comparison with previous reports on other high-Tc cuprates, we identify the A1g and B1g symmetry modes that are Raman allowed within the ideal body-centered-tetragonal unit cell. On the basis of the assignments proposed here, we discuss the influence of aliovalent substitutions on the phonon modes in Bi2Sr2-xLaxCuO6+d and Bi2Sr2Ca1-YYyCu2O 8+d. We interpret the observed changes in phonon frequencies and intensities as a combination of internal pressure and charge redistribution effects induced by doping.
| Original language | English |
|---|---|
| Pages (from-to) | 2003-2005 |
| Number of pages | 3 |
| Journal | Journal of Physics and Chemistry of Solids |
| Volume | 59 |
| Issue number | 10-12 |
| Publication status | Published - 1998 Oct |
| Externally published | Yes |
Keywords
- A. superconductors
- C. Raman spectroscopy
- Charge redistribution effects
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Osada, M., Kakihana, M., Käll, M., & Börjesson, L. (1998). Raman-active phonons in Bi2Sr2Can-1CunO2n+4d (n = 1,2,3) - Phonon assignment and charge redistribution effects. Journal of Physics and Chemistry of Solids, 59(10-12), 2003-2005.