Dynamics of Cu monomer,dimer and trimer on Ag (110) (1 × 2) missing‐row reconstructed surface |
| |
Authors: | Khalid Sbiaai Yahia Boughaleb M'hammed Mazroui Abdelkader Kara |
| |
Institution: | 1. Laboratoire de la Physique de la Matière Condensée, Université Chouaib Doukkali, , El Jadida, Morocco;2. Laboratoire de Physique de la Matière Condensée, Unité de recherche associée au CNRST (URAC 10), Université Hassan II‐ Mohammedia. Faculté des Sciences Ben M'Sik, B.P. 7955, , Casablanca, Morocco;3. Académie Hassan II des Sciences et Techniques, , Rabat, Morocco;4. Department of Physics, University of Central Florida, , USA |
| |
Abstract: | The authors aimed to investigate the diffusion of Cu monomer, dimer and trimer on Ag (110) (1×2) missing‐row surface. This problem is addressed through molecular dynamic simulation based on semi‐empirical many‐body potential, derived from the embedded atom method. Within this approach, we have identified and calculated the activation energy of each microscopic mechanism. Thus, for Cu monomer, the diffusion process occurs essentially by simple hopping between nearest‐neighbor sites. While for the Cu dimer, three processes have been identified such as dissociation–reassociation (DR), concerted jump (CJ) and leapfrog mechanisms (LF) with a slight predominance of DR process and a dual competition between CJ and LF processes. But, in the case of small one‐dimensional cluster such as trimer on (110)(1×2) missing‐row reconstructed surface, the main diffusion mechanism is the LF process. These results shed light on the diffusion processes on missing‐row reconstructed surfaces, especially for heterogeneous systems. Copyright © 2013 John Wiley & Sons, Ltd. |
| |
Keywords: | embedded adatom method molecular dynamic simulations adatom dimer trimer copper silver |
|
|