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  Growth of Two-Dimensional Lithium Islands on CaO(001) Thin Films

Shao, X., Cui, Y., Schneider, W.-D., Nilius, N., & Freund, H.-J. (2012). Growth of Two-Dimensional Lithium Islands on CaO(001) Thin Films. The Journal of Physical Chemistry C, 116(33), 17980-17984. doi:10.1021/jp306328c.

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資料種別: 学術論文

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 作成者:
Shao, Xiang1, 著者           
Cui, Yi1, 著者           
Schneider, Wolf-Dieter1, 2, 著者
Nilius, Niklas1, 著者           
Freund, Hans-Joachim1, 著者           
所属:
1Chemical Physics, Fritz Haber Institute, Max Planck Society, ou_24022              
2Ecole Polytechnique Federale de Lausanne, Institute of Condensed Matter Physics, CH-1015 Lausanne, Switzerland, ou_persistent22              

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 要旨: The nucleation and growth behavior of lithium on a CaO/Mo(001) thin film has been investigated by means of scanning tunneling microscopy and spectroscopy. The Li follows two different growth regimes on the surface. Whereas extended 2D islands develop on top of the defect-free CaO terraces, small 3D deposits decorate a network of domain boundaries that is present in the oxide film. The 2D islands have metallic character, as deduced from a standing wave pattern observed on their surface at low-bias. In contrast, a cationic nature is proposed for the defect-bound 3D species as a result of an electron- transfer from the Li 2s valence orbital into trap states localized in the CaO line defects. Tunneling spectroscopy reveals an unoccupied gap state below the CaO conduction band that originates from Li−O hybridization across the metal-oxide interface. With increasing diameter of the Li islands, this state shifts toward the Fermi level, reflecting the decreasing workfunction at higher Li coverage.

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言語: eng - English
 日付: 2012-06-272012-08-012012-08-012012-08-23
 出版の状態: 出版
 ページ: 5
 出版情報: -
 目次: -
 査読: 査読あり
 識別子(DOI, ISBNなど): DOI: 10.1021/jp306328c
 学位: -

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出版物 1

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出版物名: The Journal of Physical Chemistry C
  その他 : J. Phys. Chem. C
種別: 学術雑誌
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出版社, 出版地: Washington DC : American Chemical Society
ページ: - 巻号: 116 (33) 通巻号: - 開始・終了ページ: 17980 - 17984 識別子(ISBN, ISSN, DOIなど): ISSN: 1932-7447
CoNE: https://pure.mpg.de/cone/journals/resource/954926947766