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ID 18788
本文ファイル
著者
Taguchi, Munetaka
Chainani, Ashish
Horiba, Koji
Takata, Yasutaka
Yabashi, Makina
Tamasaku, Kenji
Nishino, Yoshinori
Miwa, Daigo
Ishikawa, Tetsuya
Takeuchi, Tomoyuki
Yamamoto, Kazuo
Matsunami, Masaharu
Shin, Shik
Yokoya, Takayoshi
Ikenaga, Eiji
Kobayashi, Keisuke
Mochiku, Takashi
Hirata, Kazuto
Hori, Junya
Ishii, Kiyotaka
Nakamura, Fumihiko
抄録(英)
Hard x-ray photoemission spectroscopy (PES) of Cu core electronic states, with a probing depth of ∼60, is used to show that the Zhang-Rice singlet feature is present in La2CuO4 but is absent in Nd2CuO4. Hole and electron doping in La2-xSrxCuO4 (LSCO) and Nd2-xCexCuO4 (NCCO) result in new well-screened features which are missing in soft x-ray PES. Impurity Anderson model calculations establish screening from doped states as its origin, which is strongly suppressed within 15 of the surface. Complemented with x-ray absorption spectroscopy, the small chemical-potential shift in core levels (∼0.2eV) are shown to be consistent with modifications of valence and conduction band states spanning the band gap (∼1eV) upon hole and electron doping in LSCO and NCCO.
掲載誌名
Physical Review Letters
95巻
17号
開始ページ
177002-1
終了ページ
177002-4
出版年月日
2005-10-19
出版者
American Physical Society
ISSN
0031-9007
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
Copyright (c) 2005 American Physical Society.
関連情報URL
部局名
先端物質科学研究科



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