Observation of anomalous LEED patterns from Li adsorbed Cu(001): 2 × 1, 3 × 3 and 4 × 4

Hiroshi Tochihara, Seigi Mizuno

Research output: Contribution to journalArticle

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Abstract

Lithium adsorption on Cu(001) at 300 K has been studied with low-energy electron diffraction (LEED) and Auger electron spectroscopy. The LEED patterns show a sequential change with increasing Li coverage; 2 × 1, 3 × 3 and 4 × 4. The 2 × 1 LEED pattern has weak streaky spots denoted by a matrix of 1 2θ 0 -1 4θ 2 in the coverage range of 0.375 ≤ Θ ≤ 0.4. The 4 × 4 pattern disappears upon further Li deposition and the surface becomes disordered. The features and behavior of the streaky spots are very similar to those observed for K or Cs adsorption on Ni(110) or Cu(110) at room temperature, and this leads to a structure model for 2 × 1; the Cu(001) surface undergoes a missing row type restructuring induced by Li adsorption. Li adatoms are located in missing rows formed by themselves resulting in the streaky spots. Possible structure models for the 3 × 3 and 4 × 4 structures are proposed and they are assigned to ordered surface-alloys of LiCu on Cu(001).

Original languageEnglish
Pages (from-to)89-98
Number of pages10
JournalSurface Science
Volume279
Issue number1-2
DOIs
Publication statusPublished - Dec 1 1992
Externally publishedYes

Fingerprint

Low energy electron diffraction
Diffraction patterns
diffraction patterns
electron diffraction
Model structures
Adsorption
adsorption
Adatoms
Auger electron spectroscopy
Lithium
adatoms
Auger spectroscopy
electron spectroscopy
energy
lithium
room temperature
matrices
Temperature

All Science Journal Classification (ASJC) codes

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

Cite this

Observation of anomalous LEED patterns from Li adsorbed Cu(001) : 2 × 1, 3 × 3 and 4 × 4. / Tochihara, Hiroshi; Mizuno, Seigi.

In: Surface Science, Vol. 279, No. 1-2, 01.12.1992, p. 89-98.

Research output: Contribution to journalArticle

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abstract = "Lithium adsorption on Cu(001) at 300 K has been studied with low-energy electron diffraction (LEED) and Auger electron spectroscopy. The LEED patterns show a sequential change with increasing Li coverage; 2 × 1, 3 × 3 and 4 × 4. The 2 × 1 LEED pattern has weak streaky spots denoted by a matrix of 1 2θ 0 -1 4θ 2 in the coverage range of 0.375 ≤ Θ ≤ 0.4. The 4 × 4 pattern disappears upon further Li deposition and the surface becomes disordered. The features and behavior of the streaky spots are very similar to those observed for K or Cs adsorption on Ni(110) or Cu(110) at room temperature, and this leads to a structure model for 2 × 1; the Cu(001) surface undergoes a missing row type restructuring induced by Li adsorption. Li adatoms are located in missing rows formed by themselves resulting in the streaky spots. Possible structure models for the 3 × 3 and 4 × 4 structures are proposed and they are assigned to ordered surface-alloys of LiCu on Cu(001).",
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N2 - Lithium adsorption on Cu(001) at 300 K has been studied with low-energy electron diffraction (LEED) and Auger electron spectroscopy. The LEED patterns show a sequential change with increasing Li coverage; 2 × 1, 3 × 3 and 4 × 4. The 2 × 1 LEED pattern has weak streaky spots denoted by a matrix of 1 2θ 0 -1 4θ 2 in the coverage range of 0.375 ≤ Θ ≤ 0.4. The 4 × 4 pattern disappears upon further Li deposition and the surface becomes disordered. The features and behavior of the streaky spots are very similar to those observed for K or Cs adsorption on Ni(110) or Cu(110) at room temperature, and this leads to a structure model for 2 × 1; the Cu(001) surface undergoes a missing row type restructuring induced by Li adsorption. Li adatoms are located in missing rows formed by themselves resulting in the streaky spots. Possible structure models for the 3 × 3 and 4 × 4 structures are proposed and they are assigned to ordered surface-alloys of LiCu on Cu(001).

AB - Lithium adsorption on Cu(001) at 300 K has been studied with low-energy electron diffraction (LEED) and Auger electron spectroscopy. The LEED patterns show a sequential change with increasing Li coverage; 2 × 1, 3 × 3 and 4 × 4. The 2 × 1 LEED pattern has weak streaky spots denoted by a matrix of 1 2θ 0 -1 4θ 2 in the coverage range of 0.375 ≤ Θ ≤ 0.4. The 4 × 4 pattern disappears upon further Li deposition and the surface becomes disordered. The features and behavior of the streaky spots are very similar to those observed for K or Cs adsorption on Ni(110) or Cu(110) at room temperature, and this leads to a structure model for 2 × 1; the Cu(001) surface undergoes a missing row type restructuring induced by Li adsorption. Li adatoms are located in missing rows formed by themselves resulting in the streaky spots. Possible structure models for the 3 × 3 and 4 × 4 structures are proposed and they are assigned to ordered surface-alloys of LiCu on Cu(001).

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