Structure-dependent mixed valence of Sm on Cu(1 1 1) studied by XPS and STM

Yasuo Nakayama, Hiroshi Kondoh, Toshiaki Ohta

研究成果: Article査読

13 被引用数 (Scopus)

抄録

Geometric and electronic structures of adsorbed Sm on Cu(1 1 1) were studied by scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS). The surface morphology and Sm valency change with the Sm coverage, suggesting that Sm atoms in the islands have a valence of approximately 2.7 and those diffusing are divalent. Heating the adlayers yields surface alloy and close-packed overlayer of Sm depending on the coverage and temperature. Atomically resolved STM images indicate that the surface of the alloy phase is not rigid. The closed packed overlayer of a mixed valence Sm is observed as a uniform atomic species.

本文言語English
ページ(範囲)53-62
ページ数10
ジャーナルSurface Science
552
1-3
DOI
出版ステータスPublished - 2004 3 10
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 表面および界面
  • 表面、皮膜および薄膜
  • 材料化学

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