亚单层外延生长的相场模型
Phase Field Modelling of Submonolayer Epitaxial Growth
摘要：
我们报告使用连续相场模型模拟亚单层外延生长。岛的密度和岛的尺寸分布都表现出标度行为。当毛细管长度较小时，岛的尺寸分布与不可逆聚集动力学一致。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定量一致。然而，岛的总密度的缩放不同意与已知的结果。其原因可追溯到相场模型中的岛形核和聚集机制。
英文摘要：
We report simulations of submonolayer epitaxial growth using a continuum phase field model. The island density and the island size distribution both 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.
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