Hybrid surface structures formed on Cu(001) and Ag(001) by alkali-metal adsorption

Hiroshi Tochihara, Seigi Mizuno

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We have determined the surface structure sequence 2 × 1 → 3 × 3 → 4 × 4 formed on Cu(001) with increasing Li coverage at 300 K by using low-energy electron diffraction analysis. In the 2 × 1 structure all Li atoms occupy substitutional sites, whereas the 3 × 3 and 4 × 4 structure similar to each other contain both substitutional Li atoms and Li adatoms. It is concluded that the surface accommodates additional Li atoms at the cost of the average adsorption energy in the sequence above. Another sequence 2 × 1 → 3 × 3 is found for Na adsorption on Ag(001) at room temperature. The 3 × 3 surface structure is considered to be the same one formed in Cu(001)-Li. Different sequence 2 × 1 → 3 × 1 is observed for K adsorption on Ag(001). Structure models for the 3 × 1 is proposed. We conclude that the 3 × 3 and 3 × 1 structures following the same 2 × 1 structure are formed basically due to the same cause and that different structures are realized owing to the size effect.

Original languageEnglish
Pages (from-to)10-18
Number of pages9
JournalSurface Science
Volume357-358
DOIs
Publication statusPublished - Jun 20 1996
Externally publishedYes

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Alkali Metals
Alkali metals
Surface structure
alkali metals
Adsorption
Atoms
adsorption
atoms
Adatoms
Low energy electron diffraction
Model structures
adatoms
electron diffraction
energy
causes
room temperature
Temperature

All Science Journal Classification (ASJC) codes

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

Cite this

Hybrid surface structures formed on Cu(001) and Ag(001) by alkali-metal adsorption. / Tochihara, Hiroshi; Mizuno, Seigi.

In: Surface Science, Vol. 357-358, 20.06.1996, p. 10-18.

Research output: Contribution to journalArticle

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N2 - We have determined the surface structure sequence 2 × 1 → 3 × 3 → 4 × 4 formed on Cu(001) with increasing Li coverage at 300 K by using low-energy electron diffraction analysis. In the 2 × 1 structure all Li atoms occupy substitutional sites, whereas the 3 × 3 and 4 × 4 structure similar to each other contain both substitutional Li atoms and Li adatoms. It is concluded that the surface accommodates additional Li atoms at the cost of the average adsorption energy in the sequence above. Another sequence 2 × 1 → 3 × 3 is found for Na adsorption on Ag(001) at room temperature. The 3 × 3 surface structure is considered to be the same one formed in Cu(001)-Li. Different sequence 2 × 1 → 3 × 1 is observed for K adsorption on Ag(001). Structure models for the 3 × 1 is proposed. We conclude that the 3 × 3 and 3 × 1 structures following the same 2 × 1 structure are formed basically due to the same cause and that different structures are realized owing to the size effect.

AB - We have determined the surface structure sequence 2 × 1 → 3 × 3 → 4 × 4 formed on Cu(001) with increasing Li coverage at 300 K by using low-energy electron diffraction analysis. In the 2 × 1 structure all Li atoms occupy substitutional sites, whereas the 3 × 3 and 4 × 4 structure similar to each other contain both substitutional Li atoms and Li adatoms. It is concluded that the surface accommodates additional Li atoms at the cost of the average adsorption energy in the sequence above. Another sequence 2 × 1 → 3 × 3 is found for Na adsorption on Ag(001) at room temperature. The 3 × 3 surface structure is considered to be the same one formed in Cu(001)-Li. Different sequence 2 × 1 → 3 × 1 is observed for K adsorption on Ag(001). Structure models for the 3 × 1 is proposed. We conclude that the 3 × 3 and 3 × 1 structures following the same 2 × 1 structure are formed basically due to the same cause and that different structures are realized owing to the size effect.

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