Simultaneous step meandering and bunching instabilities controlled by Ehrlich-Schwoebel barrier and elastic interaction

Simultaneous step meandering and bunching instabilities controlled by Ehrlich-Schwoebel barrier and elastic interaction
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由 Ehrlich-Schwoebel 势垒和弹性相互作用控制的同时阶跃曲流和聚束不稳定性

DOI:
10.1063/1.3666781
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发表时间:
2011-12
影响因子:
4
通讯作者:
于艳梅
于艳梅
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
于艳梅

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通过相场模拟,我们研究了同时存在Ehrlich-Schwoebel势垒和弹性相互作用时的阶跃不稳定性和聚束不稳定性。在低吸附原子沉积速率下,Ehrlich-Schwoebel势垒引起的漂移不稳定性依赖于弹性相互作用。基于Ehrlich-Schwoebel势垒和弹性相互作用的相互作用,利用邻近表面力单极子的预定义幅度分布,设计了有序阶跃曲折-聚束结构。
Through phase-field simulations, we investigate simultaneous step meandering and bunching instabilities with the presence of Ehrlich-Schwoebel barrier and elastic interaction. The meandering instability induced by the Ehrlich-Schwoebel barrier is found to be dependent on the elastic interaction at low adatom deposition rate. The ordered step meandering-bunching structure is designed by using the predefined magnitude distribution of the force monopoles on vicinal surfaces based on interplay between the Ehrlich-Schwoebel barrier and the elastic interaction.
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