Change in phonon Raman spectra of Bi2Sr2Ca1 - xYxCu2O8 + d induced by hole filling and implications for phonon assignments

M. Osada, M. Kakihana, M. Käll, L. Börjesson, M. Yashima, M. Yoshimura

Research output: Contribution to journalArticle

Abstract

The phonon Raman spectra of Bi2Sr2Ca1 - xYxCu2O8 + d (x = 0-1) have been investigated in a number of well-defined single crystal and polycrystalline samples. From the polarization and Y doping dependence, and from a comparison with previous reports on Bi-based cuprates, we identify the (6A1g + 1B1g) symmetry modes that are Raman allowed within the ideal body-centered tetragonal unit-cell. The vibrational modes that involve atoms in the CuO5 pyramid exhibit drastic changes with increasing Y doping: the bridging-oxygen phonon softens strongly, whereas the CuO2-plane phonons both harden and increase in intensity with increasing Y content. Although the intensity increases can be attributed to the reduced metallic screening in the hole-depleted Y doped samples, the phonon frequency variations are mainly due to the structural changes induced by the decrease in the average Ca/Y ion radius.

Original languageEnglish
Pages (from-to)107-110
Number of pages4
JournalMaterials Science and Engineering B
Volume41
Issue number1
DOIs
Publication statusPublished - 1996 Oct
Externally publishedYes

Fingerprint

Raman scattering
Doping (additives)
Raman spectra
Phonons
pyramids
cuprates
vibration mode
Screening
phonons
screening
Single crystals
Ions
Polarization
Oxygen
Atoms
radii
single crystals
symmetry
oxygen
polarization

Keywords

  • Hole-filling effect
  • Low-temperature Raman measurement
  • Phonon assignment
  • Polarized Raman measurement
  • Single crystal

ASJC Scopus subject areas

  • Materials Science(all)
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Change in phonon Raman spectra of Bi2Sr2Ca1 - xYxCu2O8 + d induced by hole filling and implications for phonon assignments. / Osada, M.; Kakihana, M.; Käll, M.; Börjesson, L.; Yashima, M.; Yoshimura, M.

In: Materials Science and Engineering B, Vol. 41, No. 1, 10.1996, p. 107-110.

Research output: Contribution to journalArticle

Osada, M. ; Kakihana, M. ; Käll, M. ; Börjesson, L. ; Yashima, M. ; Yoshimura, M. / Change in phonon Raman spectra of Bi2Sr2Ca1 - xYxCu2O8 + d induced by hole filling and implications for phonon assignments. In: Materials Science and Engineering B. 1996 ; Vol. 41, No. 1. pp. 107-110.
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