English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Monte carlo simulation of temperature programmed desorption of Ag atoms from a Ru(001) surface

MPS-Authors
/persons/resource/persons260030

Kaletta,  D.
Fritz Haber Institute, Max Planck Society;

/persons/resource/persons260032

Reynolds,  A. E.
Fritz Haber Institute, Max Planck Society;

External Resource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Mrozek, P., Kaletta, D., Reynolds, A. E., & Wandelt, K. (1990). Monte carlo simulation of temperature programmed desorption of Ag atoms from a Ru(001) surface. Vacuum, 41(1-3), 199-201. doi:10.1016/0042-207X(90)90308-L.


Cite as: http://hdl.handle.net/21.11116/0000-0008-52F9-3
Abstract
A Monte Carlo simulation method was applied to study the desorption process of submonolayer amounts of Ag atoms from Ru(001). The attractive lateral interactions between Ag atoms leading to island formation are also manifested in the desorption kinetics. First the equilibrium configuration of the Ag overlayer of hexagonal symmetry was simulated for different coverages. In the simplest case the desorption rate is evaluated as the sum of first order desorption rates of Ag atoms having 0, 1, 2, ...6 nearest Ag-Ag bonds, assuming the preexponential factor for desorption to be constant. The stimulated desorption curves exhibit quasi-zeroth order desorption kinetics for initial Ag coverages less than 0.35 ML. At higher coverages the desorption spectra are shifted towards higher temperatures and no unique slope can be identified. When the pre-exponential factor, however, is assumed to increase with Ag coverage according to a simple combinatory formula, the calculated desorption spectra exhibit the quasi-zeroth order behaviour also up to higher coverages in qualitative agreement with experimental results.