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


研究成果: Article査読


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.

ジャーナルMaterials Science and Engineering B
出版ステータスPublished - 1996 10

ASJC Scopus subject areas

  • 材料科学(全般)
  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学


「Change in phonon Raman spectra of Bi<sub>2</sub>Sr<sub>2</sub>Ca<sub>1 - x</sub>Y<sub>x</sub>Cu<sub>2</sub>O<sub>8 + d</sub> induced by hole filling and implications for phonon assignments」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。