Polarization-dependent X-ray photoemission spectroscopy for High-T^sub c^ cuprate superconductors

We have performed photon energy (hv) and linear polarization dependent X-ray photoemission for optimal doped Pb-Bi2Sr2CaCu2O8+δ (Bi2212) to investigate the ground Cu 3d orbital symmetry. We identified that the bulk Cu 3d components in valence-band spectra develop with decreasing hv from 7900 eV to 4...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2018-05, Vol.536, p.843
Main Authors: Yamagami, Kohei, Kanai, Yuina, Naimen, Sho, Fujiwara, Hidenori, Kiss, Takayuki, Tanaka, Arata, Higashiya, Atsushi, Imada, Shin, Kadono, Toshiharu, Tamasaku, Kenji, Muro, Takayuki, Yabashi, Makina, Ishikawa, Tetsuya, Eisaki, Hiroshi, Miyasaka, Shigeki, Tajima, Setsuko, Sekiyama, Akira
Format: Article
Language:English
Subjects:
Band spectra
Crystal structure
Linear polarization
Photoelectric emission
Spectrum analysis
Superconductivity
Superconductors
Temperature
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Summary:We have performed photon energy (hv) and linear polarization dependent X-ray photoemission for optimal doped Pb-Bi2Sr2CaCu2O8+δ (Bi2212) to investigate the ground Cu 3d orbital symmetry. We identified that the bulk Cu 3d components in valence-band spectra develop with decreasing hv from 7900 eV to 460 eV. Moreover, the photoelectron intensity ratio of the valence-band spectra measured at hv = 460 eV has shown that the Cu 3dx2-y2 orbital contributions are dominant near the Fermi level (EF). Meanwhile, we revealed that the bulk Cu 2p3/2 core-level spectra without the Bi 4s component is detected at hv = 1550 eV compared with hv and linear-polarization-dependent spectra.
ISSN:0921-4526
1873-2135