Title

Ag Adatom And Dimer Motion On Cu(1 1 0)(1 × 2) Missing Row Surface

Keywords

Copper; Diffusion; Embedded adatom method; Molecular dynamics simulations; Silver; Small cluster

Abstract

The diffusion of Ag monomer and dimer on Cu(1 1 0)(1 × 2) missing row reconstructed surface is investigated by using the molecular dynamics simulation based on semi-empirical many-body potentials derived from the embedded atom method. In the case of monomer diffusion, both simple jump and long jump follow an Arrhenius law in a large temperature range (300-500 K) but with a small difference in activation energy. The activation barrier energy for simple jump is found to be (0.27 ± 0.02) eV with corresponding prefactor 5.9 ps-1. However, for double jump we found Ea2 = (0.33 ± 0.05) eV. While in the case of dimer, we found that the adatoms activity is notably reduced at low temperature (T < 400 K) and the diffusion via dissociation-reassociation process is more favoured than the other processes. This finding is in a good agreement with the energetic prediction. The presence of concerted jump and leapfrog process is very rare due to their high corresponding activation energy. © 2013 Elsevier B.V. All rights reserved.

Publication Date

1-1-2013

Publication Title

Optical Materials

Volume

36

Issue

1

Number of Pages

42-46

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.optmat.2013.06.016

Socpus ID

84886233592 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84886233592

This document is currently not available here.

Share

COinS