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Exchange process diffusion of silver adatom on low-index copper surface: case of Cu(110) surface

K. SBIAAI1

Affiliation

  1. Laboratoire Physique de la Matière Condensée (LPMC), Faculté des sciences, Université Chouaïb Doukkali, El Jadida, Morocco

Abstract

The transport properties of the Ag isolated atom (adatom) on the Cu(110) surface have been investigated using molecular dynamics (MD) simulation. A good agreement between our finding for activation energies and those existing in literature is observed. On the other hand, the study of surface atoms vibration via the mean square perpendicular amplitude showed a linear trend (T ≥ 350K). This investigation has been made between 300K and 500K indicating harmonic behavior of the surface atoms in the temperature interval [350K, 500K]. In addition, the presence of the exchange process is related to the perpendicular amplitude magnitude. The MD simulations (from 375K to 500K) show that the exchange rate has an Arrhenius behavior. Thus, the dynamic activation energy obtained from the Arrhenius plot is in excellent agreement with the static one which is calculated by the drag method at 0K..

Keywords

Molecular dynamics simulation, Surface diffusion, Exchange process, Copper, Silver.

Submitted at: April 17, 2013
Accepted at: June 12, 2013

Citation

K. SBIAAI, Exchange process diffusion of silver adatom on low-index copper surface: case of Cu(110) surface, Journal of Optoelectronics and Advanced Materials Vol. 15, Iss. 5-6, pp. 501-504 (2013)