Origin of Compact Triangular Islands in Metal-on-Metal Growth
Origin of Compact Triangular Islands in Metal-on-Metal Growth
复制标题
金属对金属生长中致密三角岛的起源
DOI：
10.1103/physrevlett.83.2608
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发表时间：
1999
影响因子：
8.6
通讯作者：
B. Lundqvist
中科院分区：
文献类型：
--
作者：
S. Ovesson;A. Bogicevic;B. Lundqvist
利用密度泛函计算得到的能垒，通过动力学蒙特卡罗模拟，确定了紧密堆积表面上致密三角岛的微观起源。与前人的研究结果不同，角扩散各向异性在中温时控制了致密岛的形状。我们合理地解释了在低温下生长的树枝晶取向与在较高温度下生长的三角形岛之间的关系，并解释了为什么在某些系统中，树枝晶在变得致密之前变得肥胖。
The microscopic origin of compact triangular islands on close-packed surfaces is identified using kinetic Monte Carlo simulations with energy barriers obtained from density-functional calculations. In contrast to earlier accounts, corner diffusion anisotropy is found to control the shape of compact islands at intermediate temperatures. We rationalize the correlation between the orientation of dendrites grown at low temperatures and triangular islands grown at higher temperatures, and explain why in some systems dendrites grow fat before turning compact.