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On the temperature induced transformation between the two Al(111)-(√3 × √3)R30°-Rb structures

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Author

Summary, in English

The dynamics of the temperature induced transformation between low and high temperature adsorption phases of Rb on Al(111) has been followed by high resolution core level spectroscopy. Particular emphasis has been paid to the order-preserving transformation between the low and high temperature Al(111)-Rb-(√3 × √3)R30° structures in which Rb atoms occupy on-top and substitutional sites, respectively. For a Rb coverage of 0.33 monolayer the rate of conversion from on-top ti substitutional sites is found to increase strongly at 250 K. For Rb coverages below 0.33 but above approximately 0.14 monolayers the conversion occurs at lower temperatures. Increasing the coverage above 0.33 monolayers increases the conversion temperature. The possibility to detect the Al atoms which are expelled from the first Al layer during the conversion is demonstrated.

Publishing year

1995-12-01

Language

English

Pages

37-43

Publication/Series

Surface Science

Volume

343

Issue

1-2

Document type

Journal article

Publisher

Elsevier

Keywords

  • Alkali metals
  • Aluminum
  • Photoelectron emission
  • Single crystal surfaces
  • Soft X-ray photoelectron spectroscopy
  • Surface relaxation and reconstruction
  • Surface thermodynamics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0039-6028