Pt/Pt(111)薄膜生长的计算机模拟研究  

The Aggregation Processes of Pt/Pt(111) Growth Studied by Computer Simulations

作　　者：庄国策[1] 朱晓斌[1] 王炜[1] 

机构地区：[1]南京大学物理系

出　　处：《南京大学学报（自然科学版）》2001年第4期502-507,共6页Journal of Nanjing University（Natural Science）

基　　金：国家自然科学基金 (196 0 40 0 6 )

摘　　要：以Pt/Pt(111)薄膜生长为例 ,建立一个包含更为细致的原子扩散过程的模型 ,采用蒙特卡洛模拟方法研究了不同覆盖率 ,不同温度下 (111)面上外延生长早期阶段的原子聚集行为 ,得到了一系列分形状薄膜的形貌 .计算表明 ,用来描述枝状晶体枝杆平均宽度的原子的平均最近邻配位数随温度的升高而增加 ,与扫描隧道电镜实验测量的结果一致 .同时 。The atomic aggregation processes in the early stages of Pt/Pt(111) surface growth are studied by kinetic Monte Carlo simulations. The morphologies of the islands are studied at different substrate temperatures, which are comparable to the results of experiments. The average coordination number of the atoms on the surface is found as a function of temperature, which is in agreement with the thickness of the island branches measured by the STM experiments. In addition, the influence of the deposition rate on the island morphology is also studied. Different morphologies of the islands (dendritic, fractal, or compact islands) are found.

关 键 词：表面形貌 原子扩散 最近邻配位数 沉积速率 铂 薄膜生长 计算机模拟 

分 类 号：O484.1[理学—固体物理]