Phonon Raman scattering of R<sub>2</sub>CuO<sub>4</sub> (R = Pr, Nd, Sm, and Gd)期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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

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

Affiliation:	(1) Faculty of Integrated Arts and Sciences, Hiroshima University, 724 Higashi-Hiroshima, Japan;(2) College of Science and Engineering, Aoyama Gakuin University, 157 Tokyo, Japan

Abstract:	For Gd₂CuO₄, a new symmetry-forbidden phonon for the tetragonal T structure is observed. This implies that oxygen in the CuO₂ plane is locally distorted along the CuO₂ plane. Such distortion has never been observed for other T-type superconductors, which show superconductivity by Ce doping. The disappearance of superconductivity for Gd can be correlated with the appearance of the distortion due to oxygen in the CuO₂ plane.

Keywords:	Raman scattering T /content/l7544980374rw507/xxlarge8242.gif" alt=" prime" align=" BASELINE" BORDER=" 0" > structure local distortion phonon
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