Coherent islands and microstructural evolution.
Coherent islands and microstructural evolution.
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DOI：
10.1103/physrevb.48.18203
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发表时间：
1993-12
期刊：
影响因子：
--
通讯作者：
Drucker
中科院分区：
文献类型：
--
作者：
Drucker
晶格失配外延系统中的应变岛生长不同于松弛岛生长。应变岛的总弹性能改变其化学势和生长速率。研究了仅通过表面扩散相互作用的失配共面半球帽系综的这种效应。应变岛的生长速率的一般表达式，得到包括弹性能的驱动力Ostwald熟化。第一次，据我们所知，相干到非相干过渡显着影响成熟动力学。相干岛的生长速度比相同半径的非相干岛慢
Strained island growth in lattice-mismatched epitaxial systems differs from relaxed island growth. The total elastic energy of a strained island changes its chemical potential and growth rate. This effect is investigated for an ensemble of misfitting coplanar hemispherical caps interacting through surface diffusion alone. A general expression for the growth rate of strained islands is obtained by including elastic energies in the driving force for Ostwald ripening. For the first time, to our knowledge, a coherent-to-incoherent transition is shown to dramatically affect ripening kinetics. Coherent islands are shown to grow more slowly than incoherent islands of the same radius