High-resolution oxygen-K absorption study of Bi2Sr2Ca1-xYxCu2O8 (x=0.0 and 0.6) and YBa2Cu2O7-δ (δ=0.0-0.7)

Takashi Takahashi; S. Suzuki; T. Kusunoki; S. Sato; H. Katayama-Yoshida; A. Yamanaka; F. Minami; S. Takekawa

doi:10.1016/0921-4534(91)91752-P

High-resolution oxygen-K absorption study of Bi2Sr2Ca1-xYxCu2O8 (x=0.0 and 0.6) and YBa2Cu2O7-δ (δ=0.0-0.7)

Takashi Takahashi, S. Suzuki, T. Kusunoki, S. Sato, H. Katayama-Yoshida, A. Yamanaka, F. Minami, S. Takekawa

Advanced Institute for Materials Research (AIMR)

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

High-energy-resolved oxygen K absorption spectra of Bi2Sr2Ca1-xYxCu2O8 (x=0.0 and 0.6) single crystals and YBa2Cu3O7-δ (δ=0.0-0.7) ceramics were reported. The experimental results show that (1) the electronic states at the Fermi level in superconductor has a dominant O2p_x,y symmetry, (2) the lowest unoccupied states in nonsuperconductor is located about 1 eV above the Fermi level and also has a strong in-plane symmetry, and (3) hole-doping causes a transfer of weight of the electronic states from the lowest unoccupied states (upper Hubbard band) to the mid-gap states produced by hole-doping at the Fermi level.

Original language	English
Pages (from-to)	1057-1058
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	185-189
Issue number	PART 2
DOIs	https://doi.org/10.1016/0921-4534(91)91752-P
Publication status	Published - 1991 Dec 1

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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High-resolution oxygen-K absorption study of Bi2Sr2Ca1-xYxCu2O8 (x=0.0 and 0.6) and YBa2Cu2O7-δ (δ=0.0-0.7). / Takahashi, Takashi; Suzuki, S.; Kusunoki, T.; Sato, S.; Katayama-Yoshida, H.; Yamanaka, A.; Minami, F.; Takekawa, S.

In: Physica C: Superconductivity and its applications, Vol. 185-189, No. PART 2, 01.12.1991, p. 1057-1058.

Research output: Contribution to journal › Article › peer-review

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abstract = "High-energy-resolved oxygen K absorption spectra of Bi2Sr2Ca1-xYxCu2O8 (x=0.0 and 0.6) single crystals and YBa2Cu3O7-δ (δ=0.0-0.7) ceramics were reported. The experimental results show that (1) the electronic states at the Fermi level in superconductor has a dominant O2px,y symmetry, (2) the lowest unoccupied states in nonsuperconductor is located about 1 eV above the Fermi level and also has a strong in-plane symmetry, and (3) hole-doping causes a transfer of weight of the electronic states from the lowest unoccupied states (upper Hubbard band) to the mid-gap states produced by hole-doping at the Fermi level.",

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