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arXiv 1207.4354cond-mat.stat-mechcond-mat.mtrl-sci
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邻面生长:聚束和曲折不稳定性

Vicinal surface growth: bunching and meandering instabilities

A. Verga

摘要:

本文研究了二维阶跃流不稳定情况下晶体生长表面的形态。聚束和蜿蜒的步骤之间的竞争导致了各种模式,其特征在于各自的不稳定的增长率。粗糙度指数从1/2到1,纯聚束之间的曲折制度。使用数值模拟,我们观察到,一般来说,两个政权之间的过渡发生。我们发现表面形状和粗糙度的时间演化与实验定量一致。

英文摘要:

The morphology of a growing crystal surface is studied in the case of an unstable two-dimensional step flow. Competition between bunching and meandering of steps leads to a variety of patterns characterized by their respective instability growth rates. The roughness exponent is shown to go from 1/2 to 1, between the pure bunching to the meandering regimes. Using numerical simulations, we observe that generically, a transition between the two regimes occurs. We find surface shapes and roughness time evolution in quantitative agreement with experiments.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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