Pattern formation in the reaction with anisotropic lateral adsorbate-adsorbate interactions |
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Authors: | VP Zhdanov B Kasemo |
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Institution: | 1.Department of Applied Physics, Chalmers University of Technology, 412 96 G?teborg, Sweden,SE |
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Abstract: | We present Monte Carlo simulations of the formation of (1×2) islands in the case of the 2
A
+
B
2
→ 2
AB reaction occurring via the Langmuir-Hinshelwood mechanism on a square lattice under steady-state conditions. The model employed takes into account
the effect of anisotropic lateral B-B interactions on the rates of B diffusion and elementary reaction events. The results obtained with qualitatively realistic ratio of the rate of elementary
reaction steps indicate that the average island size depends on the details of diffusion and reaction dynamics in a similar
way as in the earlier studied case of the simplest A
+
B reaction running via the Eley-Rideal mechanism.
Received 4 January 2002 and Received in final form 2 April 2002
Published online 25 June 2002 |
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Keywords: | PACS 05 10 Ln Monte Carlo methods – 05 50 +q Lattice theory and statistics (Ising Potts etc ) – 05 70 Fh Phase transitions: general studies – 82 40 Np Temporal and spatial patterns in surface reactions |
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