Raman scattering of Pb-based high-Tc superconducting oxides

Masato Kakihana; Minoru Osada; Ichiro Nagai; Takashi Noji; Masatsune Kato; Yoji Koike

Raman scattering of Pb-based high-Tc superconducting oxides

Masato Kakihana, Minoru Osada, Ichiro Nagai, Takashi Noji, Masatsune Kato, Yoji Koike

研究成果: Article › 査読

抄録

Raman spectra of (Pb₂Cu)Sr₂Y_1-xCa_xCu₂O_8+δ (Pb3212), (Pb₂Cu)Sr_0.9La_1.1CuO_6+δ (Pb3201), and (Pb_0.5Cu_0.5)Sr₂YCu₂O_7+δ (Pb1212) were studied and vibrational assignments in harmony with the layer stacking sequences found in these Pb-based high-T_c superconducting oxides were proposed. In particular, the assignment of the 480- and 580-cm^-1. Raman bands to oxygen in the PbO and SrO layers, respectively, was unambiguously established. In the case of Pb3212 we found that the intensities of modes connected to the CuO₂-plane variations decreased with increasing carrier concentration. This effect was attributed to the increased metallic screening in the CuO₂ planes that can be expected in the hole-rich Ca-doped samples.

本文言語	English
ページ（範囲）	999-1003
ページ数	5
ジャーナル	Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
巻	46
号	9
出版ステータス	Published - 1999 9月
外部発表	はい

ASJC Scopus subject areas

機械工学
金属および合金

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title = "Raman scattering of Pb-based high-Tc superconducting oxides",

abstract = "Raman spectra of (Pb2Cu)Sr2Y1-xCaxCu2O8+δ (Pb3212), (Pb2Cu)Sr0.9La1.1CuO6+δ (Pb3201), and (Pb0.5Cu0.5)Sr2YCu2O7+δ (Pb1212) were studied and vibrational assignments in harmony with the layer stacking sequences found in these Pb-based high-Tc superconducting oxides were proposed. In particular, the assignment of the 480- and 580-cm-1. Raman bands to oxygen in the PbO and SrO layers, respectively, was unambiguously established. In the case of Pb3212 we found that the intensities of modes connected to the CuO2-plane variations decreased with increasing carrier concentration. This effect was attributed to the increased metallic screening in the CuO2 planes that can be expected in the hole-rich Ca-doped samples.",

author = "Masato Kakihana and Minoru Osada and Ichiro Nagai and Takashi Noji and Masatsune Kato and Yoji Koike",

year = "1999",

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T1 - Raman scattering of Pb-based high-Tc superconducting oxides

AU - Kakihana, Masato

AU - Osada, Minoru

AU - Nagai, Ichiro

AU - Noji, Takashi

AU - Kato, Masatsune

AU - Koike, Yoji

PY - 1999/9

Y1 - 1999/9

N2 - Raman spectra of (Pb2Cu)Sr2Y1-xCaxCu2O8+δ (Pb3212), (Pb2Cu)Sr0.9La1.1CuO6+δ (Pb3201), and (Pb0.5Cu0.5)Sr2YCu2O7+δ (Pb1212) were studied and vibrational assignments in harmony with the layer stacking sequences found in these Pb-based high-Tc superconducting oxides were proposed. In particular, the assignment of the 480- and 580-cm-1. Raman bands to oxygen in the PbO and SrO layers, respectively, was unambiguously established. In the case of Pb3212 we found that the intensities of modes connected to the CuO2-plane variations decreased with increasing carrier concentration. This effect was attributed to the increased metallic screening in the CuO2 planes that can be expected in the hole-rich Ca-doped samples.

AB - Raman spectra of (Pb2Cu)Sr2Y1-xCaxCu2O8+δ (Pb3212), (Pb2Cu)Sr0.9La1.1CuO6+δ (Pb3201), and (Pb0.5Cu0.5)Sr2YCu2O7+δ (Pb1212) were studied and vibrational assignments in harmony with the layer stacking sequences found in these Pb-based high-Tc superconducting oxides were proposed. In particular, the assignment of the 480- and 580-cm-1. Raman bands to oxygen in the PbO and SrO layers, respectively, was unambiguously established. In the case of Pb3212 we found that the intensities of modes connected to the CuO2-plane variations decreased with increasing carrier concentration. This effect was attributed to the increased metallic screening in the CuO2 planes that can be expected in the hole-rich Ca-doped samples.

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Raman scattering of Pb-based high-Tc superconducting oxides

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