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Impact of surface phase transitions and structure on surface diffusion profiles of Pb and Bi over Cu(100)
- Source :
- Surface Science. 600:1265-1276
- Publication Year :
- 2006
- Publisher :
- Elsevier BV, 2006.
-
Abstract
- Surface diffusion of Pb and Bi over Cu(1 0 0) surfaces has been studied by scanning Auger microscopy techniques. The diffusion profiles of Pb and Bi have been found to be quite different. The results show that three major factors control the shapes of the surface diffusion profiles: (a) First order phase transitions, which lead to phase coexistence over specified coverage ranges, tend to produce abrupt changes in coverage versus distance profiles; (b) profiles can be affected by the existence of significant differences in the diffusion coefficients of the various phases present, and by the possibility (c) of important changes in diffusivity within a given phase, as a function of coverage, due to interactions between the diffusing atoms. In addition, it has been shown that the strong connection between diffusion profile shapes and the 2D phase diagram allows certain features of the 2D phase diagram to be determined from diffusion profiles.
- Subjects :
- Surface diffusion
Phase transition
Auger electron spectroscopy
Chemistry
Analytical chemistry
chemistry.chemical_element
Surfaces and Interfaces
Condensed Matter Physics
Thermal diffusivity
Molecular physics
Surfaces, Coatings and Films
Bismuth
Phase (matter)
Materials Chemistry
Diffusion (business)
Phase diagram
Subjects
Details
- ISSN :
- 00396028
- Volume :
- 600
- Database :
- OpenAIRE
- Journal :
- Surface Science
- Accession number :
- edsair.doi...........aa550314816d53bd0f5709f459ae840c