Simulation of Reaction-Induced Phase Separation in Surface Alloy

• Authors: G. Zvejnieks , E. Tornau
• Languages of publication: EN

Abstracts

EN

Using kinetic Monte Carlo method we simulate the dynamics of biatomic Au_{0.3}Ni_{0.7} surface alloy separation on Ni(111) due to Ni(CO)_4 out-reaction. The experiment of Vestergaard et al. is modeled by counterbalancing dynamical processes and interactions between reactants. The simulations demonstrate step flow rate increase with CO coverage, c_{CO}, in qualitative agreement with the experiment only for c_{CO} ≲ 0.45 monolayer. Moreover, we demonstrate both CO influence on reaction process and Au domain formation.

Keywords

EN

68.43.Fg; 68.43.Hn; 68.43.Mn; 64.60.Cn

Discipline

• 68.43.Hn: Structure of assemblies of adsorbates (two- and three-dimensional clustering)
• 68.43.Fg: Adsorbate structure (binding sites, geometry)
• 68.43.Mn: Adsorption kinetics
• 64.60.Cn: Order-disorder transformations(see also 81.30.Hd Constant-composition solid-solid phase transformations: polymorphic, massive, and order-disorder in materials science; for effects of disorder on superconducting transition temperature, see 74.62.En)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 113
• Issue: 3
• Pages: 1099-1102

Dates

published

2008-03

received

2007-08-26

Contributors

author

G. Zvejnieks

• Department of Physics, University of Latvia, Raina 19, LV-1586, Riga, Latvia
• Institute for Solid State Physics, Kengaraga 8, LV-1063, Riga, Latvia

author

E. Tornau

• Semiconductor Physics Institute, Goštauto 11, LT-01108, Vilnius, Lithuania

References

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• 7. C. Quiros, O. Robach, H. Isern, P. Ordejon, S. Ferrer, Surf. Sci. 522, 161 (2003)

Identifiers

DOI

10.12693/APhysPolA.113.1099