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Valence-band structures of layered oxychalcogenides, LaCuOCh (Ch=S, Se, and Te), studied by ultraviolet photoemission spectroscopy and energy-band calculations
http://hdl.handle.net/10228/575
http://hdl.handle.net/10228/57515cbb5b0-bc0a-43a0-b890-deb781c947e1
名前 / ファイル | ライセンス | アクション |
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133.pdf (198.6 kB)
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Item type | 学術雑誌論文 = Journal Article(1) | |||||||||||
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公開日 | 2007-12-27 | |||||||||||
資源タイプ | ||||||||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||
資源タイプ | journal article | |||||||||||
タイトル | ||||||||||||
タイトル | Valence-band structures of layered oxychalcogenides, LaCuOCh (Ch=S, Se, and Te), studied by ultraviolet photoemission spectroscopy and energy-band calculations | |||||||||||
言語 | ||||||||||||
言語 | eng | |||||||||||
著者 |
植田, 和茂
× 植田, 和茂
WEKO
579
× Hosono, Hideo× Hamada, Noriaki |
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抄録 | ||||||||||||
内容記述タイプ | Abstract | |||||||||||
内容記述 | To examine the electronic structure of the valence band, ultraviolet photoemission spectra of a series of layered oxychalcogenides, LaCuOCh (Ch=S, Se, and Te), were measured. The measurements were conducted using He II, He I, and Ne I excitation lines to observe the excitation energy dependence of the spectral shape. Energy-band calculations based on a full-potential linearized augmented plain-wave method were performed. The calculated density of states and partial density of states were compared to the observed photoemission spectra. Five bands were observed in the valence band of LaCuOCh, and Ne I radiation remarkably enhanced two of them. The energy dependence of the photoionization cross section of atomic orbitals indicated that the two enhanced bands were due to the Ch p states. Energy calculations were used to assign the remaining bands. The electronic structure of LaCuOCh was further discussed using molecular-orbital diagrams to visualize the (La2O2)2+ and (Cu2Ch2)2– layers as large donor-acceptor pairs. The energy-band calculation and molecular-orbital diagram analyses suggested that the main difference among the valence-band structures of LaCuOCh (Ch=S, Se, and Te) originates from the variations in the energy position of the Ch p bands. The observed spectra are consistent with the results of the band calculations and clearly show the energy variations in the Ch p bands with respect to spectral shape and excitation energy dependence. | |||||||||||
書誌情報 |
Journal of Applied Physics 巻 98, 号 4, p. 043506-1-043506-7, 発行日 2005-08-18 |
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出版社 | ||||||||||||
出版者 | American Institute of Physics | |||||||||||
DOI | ||||||||||||
関連タイプ | isIdenticalTo | |||||||||||
識別子タイプ | DOI | |||||||||||
関連識別子 | https://doi.org/10.1063/1.2001749 | |||||||||||
ISSN | ||||||||||||
収録物識別子タイプ | ISSN | |||||||||||
収録物識別子 | 0003-6951 | |||||||||||
著作権関連情報 | ||||||||||||
権利情報 | Copyright © 2005 American Institute of Physics | |||||||||||
キーワード | ||||||||||||
主題Scheme | Other | |||||||||||
主題 | lanthanum compounds | |||||||||||
キーワード | ||||||||||||
主題Scheme | Other | |||||||||||
主題 | valence bands | |||||||||||
キーワード | ||||||||||||
主題Scheme | Other | |||||||||||
主題 | ultraviolet photoelectron spectra | |||||||||||
キーワード | ||||||||||||
主題Scheme | Other | |||||||||||
主題 | APW calculations | |||||||||||
キーワード | ||||||||||||
主題Scheme | Other | |||||||||||
主題 | electronic density of states | |||||||||||
キーワード | ||||||||||||
主題Scheme | Other | |||||||||||
主題 | photoionisation | |||||||||||
出版タイプ | ||||||||||||
出版タイプ | VoR | |||||||||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||||
査読の有無 | ||||||||||||
値 | yes | |||||||||||
資料タイプ | ||||||||||||
内容記述タイプ | Other | |||||||||||
内容記述 | Journal Article | |||||||||||
著者別名 | ||||||||||||
姓名 | Ueda, Kazushige | |||||||||||
言語 | en | |||||||||||
姓名 | 植田, 和茂 | |||||||||||
言語 | ja | |||||||||||
姓名 | ウエダ, カズシゲ | |||||||||||
言語 | ja-Kana | |||||||||||
著者所属 | ||||||||||||
Department of Materials Science, Faculty of Engineering, Kyushu Institute of Technology, 1-1 Sensui, Tobata, Kitakyushu 804-8550, Japan and Solution-Oriented Study for Science and Technology (SORST), Japan Science and Technology Agency, Kawaguchi Center Building, 4-1-8 Honcho, Kawaguchi-shi, Saitama 332-0012, Japan | ||||||||||||
著者所属 | ||||||||||||
Frontier Collaborative Research Center, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama 226-8503, Japan and Solution-Oriented Study for Science and Technology (SORST), Japan Science and Technology Agency, Kawaguchi Center Building, 4-1-8 Honcho, Kawaguchi-shi, Saitama 332-0012, Japan | ||||||||||||
著者所属 | ||||||||||||
Department of Physics, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan |