Coordination-dependent valence state of Sm adsorbed on Cu(1 0 0) and (1 1 0) studied by STM and XPS

Yasuo Nakayama, Hiroshi Kondoh, Toshiaki Ohta

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Geometric and electronic structures of Sm adlayers on Cu(1 0 0) and (1 1 0) were studied by scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS). The present results, in addition to the previous results for Sm/Cu(1 1 1) [Y. Nakayama, H. Kondoh, T. Ohta, Surf. Sci. 552 (2004) 53], indicate that the valence state of Sm adsorbed on Cu surfaces is determined by Sm-Sm and Sm-Cu coordination numbers. We propose that the valence state of the adsorbed Sm atoms can be explained by a simple thermodynamic equation including the coordination numbers.

Original languageEnglish
Pages (from-to)2403-2410
Number of pages8
JournalSurface Science
Volume600
Issue number12
DOIs
Publication statusPublished - 2006 Jun 15
Externally publishedYes

Keywords

  • Coordination number
  • Copper
  • Growth
  • Lanthanides
  • Mixed-valence
  • Morphology
  • Samarium
  • Scanning tunneling microscopy
  • X-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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