Unstable step meandering with elastic interactions.
Unstable step meandering with elastic interactions.
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DOI：
10.1103/physrevlett.86.5538
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发表时间：
2001-06
影响因子：
8.6
通讯作者：
S. Paulin;F. Gillet;O. Pierre-Louis;C. Misbah
中科院分区：
文献类型：
--
作者：
S. Paulin;F. Gillet;O. Pierre-Louis;C. Misbah
我们报告在分子束同质外延过程中，由于弹性不稳定的步骤曲折的步骤相互作用的影响的理论研究。结果表明，弹性导致粗化的细胞结构的曲折发现在以前的工作。台阶粗糙度的时间依赖性被发现是鲁棒的，表现为t（1/2）。横向长度尺度粗化被证明是敏感的基本物理机制。特别地，典型的长度遵循定律t（alpha），其中alpha = 1/6或1/4取决于线扩散是否小到可以忽略。
We report on theoretical investigations of the influence of step interactions due to elasticity on unstable step meandering during molecular beam homoepitaxy. It is shown that elasticity causes coarsening of the cellular structure of the meander found in a previous work. The time dependence of step roughness is found to be robust, behaving as t(1/2). The lateral length scale coarsening is shown to be sensitive to the underlying physical mechanisms. In particular, the typical length follows the law t(alpha), with alpha = 1/6 or 1/4 depending on whether line diffusion is negligibly small or not.