Raman-scattering study of R2CuO4 (R=Pr, Nd, Sm, and Gd)

Masayuki Udagawa, Yoshinori Nagaoka, Norio Ogita, Miki Masada, Jun Akimitsu, Kohji Ohbayashi

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

For Gd2CuO4, a symmetry-forbidden phonon for the tetragonal T' structure is observed. This shows that oxygen in the CuO2 plane is locally distorted along the plane. Such distortion has not been observed for other T'-type superconductors. The normal-mode calculation shows that the correlation between the CuO2 plane and R-O layers increases with decreasing ionic radius. The increased three-dimensional character and the appearance of the distortion of O in the CuO2 plane along the a axis are useful experimental results that help clarify the mechanism that causes the disappearance of superconductivity for Gd.

Original languageEnglish
Pages (from-to)585-588
Number of pages4
JournalPhysical Review B
Volume49
Issue number1
DOIs
Publication statusPublished - Jan 1 1994
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics

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