Scaling of island densities in submonolayer growth of binary alloys.
Scaling of island densities in submonolayer growth of binary alloys.
复制标题
二元合金亚单层生长中岛密度的缩放。
DOI：
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发表时间：
2007
影响因子：
8.6
通讯作者：
P. Maass
中科院分区：
文献类型：
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作者：
M. Einax;S. Ziehm;W. Dieterich;P. Maass
本文研究了A和B原子在F（α）（α =A，B）助熔剂作用下共沉积在平面衬底上形成的二元合金的形核动力学。基于平均场速率方程的推广，我们导出了稳定岛的数密度与比值D（α）/F（α）之间的标度关系，其中D（α）是两种吸附原子的扩散系数.新的标度律预测不同的情况下，集群的稳定性相对于它们的大小和组成。动力学蒙特卡罗模拟的预测进行了验证，并可以在实验中进行测试。
We study the nucleation kinetics of binary alloys formed by codeposition of A and B atoms onto a planar substrate with fluxes F(alpha) (alpha=A, B). Based on a generalization of mean-field rate equations, we derive scaling relations for the dependence of the number density of stable islands on the ratios D(alpha)/F(alpha), where D(alpha) are the diffusion coefficients of two types of adatoms. Novel scaling laws are predicted for different situations of cluster stabilities with respect to their size and composition. The predictions are validated by kinetic Monte Carlo simulations and can be tested in experiments.