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arXiv 1912.04877cond-mat.mtrl-sciphysics.app-ph
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各向异性剥离下亚单层外延生长的研究

Study on Sub monolayer Epitaxy Growth under Anisotropic Detachment

Jagannath Devkota, Shankar P. Shrestha

摘要:

采用动力学蒙特卡罗模拟方法研究了分子束外延亚单层膜生长过程中不同温度下扩散各向异性和成键各向异性对岛形成的影响。我们采用简单立方的固体模型和基于事件的Bortz,Kalos和Labowitch(BKL)算法的动力学蒙特卡罗方法来模拟物理现象。我们发现表面各向异性对岛的生长没有显著的影响,但对岛的形貌、生长指数和岛的尺寸分布有一定的影响。当包括键合各向异性时,得到细长的岛。

英文摘要:

We have performed Kinetic Monte Carlo simulation to study the effect of diffusion anisotropy and bonding anisotropy on island formation at different temperatures during the sub-monolayer film growth in Molecular Beam Epitaxy. We use simple cubic solid on solid model and event based Bortz, Kalos and Labowitch (BKL) algorithm on Kinetic Monte Carlo method to simulate the physical phenomena. We have found that surface anisotropy has no significant role on island elongation however it influences on the island morphology, growth exponent and island size distribution. Elongated islands were obtained when bonding anisotropy was included.

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