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Surface Diffusion in Interactive Overlayers:

Published online by Cambridge University Press:  25 February 2011

M. C. Tringides
M. C. Tringides*
Affiliation:
Department of Physics, Iowa State University, Ames Laboratory Ames, IA 50011
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Abstract

The analysis of surface diffusion in interactive overlayers deviates from the simple picture of diffusion as a random walk. Non-equilibrium processes (the growth of ordered or the disordering of already ordered islands) under constant coverage or deposition rate, can be easily used to measure surface diffusion. For the 0/W(110) system, such experiments measured an ordering activation energy ED=0.6±0.05 eV which is different from the one measured in disordering experiments ED=1 ± 0.05 eV. The difference can be accounted for by the interactions. Ordering experiments in the Ag/Si(111)-√3x√3R30 system under constant deposition, suggest the presence of non-thermal mobility.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 280: Symposium B – Evolution of Surface and Thin Film Microstructure , 1992 , 47
Copyright
Copyright © Materials Research Society 1993

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References

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