Electronic Structure of Electron-Doped Superconductor Nd_<2-x>Ce_xCuO_4 from the Analysis of Cu 2p-XPS

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概要

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• The role of the Cu 4s conduction band in the Cu 2p-XPS (X-ray photoernissionspectrum) of Nd. .Ce.Cu0. is investigated on the basis of both a simple Cub.cluster model and the impurity Anderson model. The impurity Anderson model consists of the impurity Cu 3d shell and the valence and conduction bands which are ob-tained from the O 2p and Cu 4s bands by the tight-binding approximation. From thecarrier concentration dependence of the Cu 27t-XPS, the electron doping mechanismis discussed. If the Cu 4s level is lower in energy than that estimated from the energyband calculation by a few eV, the doped electrons are shown to occupy the Cu 4sband in the low-doping regime.

• 社団法人日本物理学会の論文
• 1991-03-15

著者

• 小谷 章雄

  SPring-8

• Kotani Akio

  Department Of Neurological Surgery Nihon University School Of Medicine.

• SEINO Yasuhiro

  Department of Physics,Faculty of Science,Yamagata University

• OKADA Kozo

  Department of Physics, Okayama University

• Kotani Akio

  Department Of Mechanical Engineering Osaka University

• Okada K

  The Graduate School Of Natural Science And Technology Okayama University

• Okada Kozo

  Faculty Of Education Yamaguchi University

• Okada Kozo

  Department Of Physics Faculty Of Science Okayama University

• 小谷 章雄

  理化学研究所播磨研究所

• Okada Kozo

  The Graduate School Of Natural Science And Technology Okayama University

• Seino Yasuhiro

  Department Of Physics Faculty Of Science Tohoku University

• OKADA Kozo

  Department of Biological Chemistry, Faculty of Pharmacy, Kinki University

• KOTANI Akio

  Department of Physics, Tohoku University : Institute for Solid State Physics, University of Tokyo

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