Abstract
Activated surface diffusion on metal surfaces is receiving much attention both experimentally and theoretically. One of the main theoretical problems in this field is to explain the line-shape broadening observed when the surface coverage is increased. Recently, we have proposed a fully stochastic model, the interacting single adsorbate (ISA) model, aimed at explaining and understanding this type of experiments, which essentially consists of considering the classical Langevin formulation with two types of noise forces: (i) a Gaussian white noise accounting for the substrate friction, and (ii) a shot noise simulating the interacting adsorbates at different coverages. No interaction potential between adsorbates is included because any trace of microscopic interaction seems to be wiped out in a Markovian regime. This model describes in a good approximation, and at a very low computational cost, the line-shape broadening observed experimentally. Furthermore, its mathematical simplicity also allows to derive some analytical expressions which are of much help in the interpretation of the physics underlying surface diffusion processes.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2008 Springer Science + Business Media B.V
About this chapter
Cite this chapter
Martínez-Casado, R., Vega, J.L., Sanz, Á.S., Miret-Artés, S. (2008). Stochastic Description of Activated Surface Diffusion with Interacting Adsorbates. In: Wilson, S., Grout, P.J., Maruani, J., Delgado-Barrio, G., Piecuch, P. (eds) Frontiers in Quantum Systems in Chemistry and Physics. Progress in Theoretical Chemistry and Physics, vol 18. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-8707-3_17
Download citation
DOI: https://doi.org/10.1007/978-1-4020-8707-3_17
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-8706-6
Online ISBN: 978-1-4020-8707-3
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)