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Phase field modeling of submonolayer epitaxial growth

机译:亚单层外延生长的相场模拟

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We report simulations of submonolayer epitaxial growth using a previously proposed continuum phase field model. Both the island density and the island size distribution show scaling behavior. When the capillary length is small, the island size distribution is consistent with irreversible aggregation kinetics. As the capillary length increases, the island size distribution reflects the effects of reversible aggregation. These results are in quantitative agreement with other simulation methods and with experiments. However, the scaling of the island total density does not agree with known results. The reasons are traced to the mechanisms of island nucleation and aggregation in the phase field model.
机译:我们报告使用以前提出的连续相场模型的亚单层外延生长的模拟。岛密度和岛大小分布都显示出缩放行为。当毛细管长度小时,岛尺寸分布与不可逆的聚集动力学一致。随着毛细管长度的增加,岛的大小分布反映了可逆聚集的影响。这些结果与其他模拟方法和实验在定量上吻合。但是,岛总密度的缩放与已知结果不一致。其原因可追溯到相场模型中的岛状成核和聚集机制。

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