Monte Carlo simulation of film growth in a phase separating binary alloy model |
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Authors: | Xiuping Tao Y Shim |
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Institution: | a Centre for Simulational Physics, University of Georgia, Athens, GA 30602, United States b Department of Physics and Astronomy, University of Toledo, Toledo, OH 43606, United States |
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Abstract: | Using a kinetic Monte Carlo method, we simulate binary film (A0.5B0.5/A) growth on an L×L square lattice with the focus on the domain growth behaviour. We compute the average domain area, A(t), as a measure of domain size. For a sufficiently large system, we find that A(t) grows with a power law in time with A(t)∼t2/3 after the initial transient time. This implies that the dynamic exponent for domain growth with non-conserved order parameter is z=3, a value which was theoretically predicted for the conserved order parameter case. Further analysis reveals that such a power-law behaviour emerges because the order parameter is approximately conserved after the early stage of growth. |
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Keywords: | 05 10 Ln 64 75 +g 68 55 -a 81 15 Aa |
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