表面剂诱导外延中二维岛形状和密度随沉积率的演变  

Evolution of 2Disland Shape and Density with Flux in Surfactant Mediated Epitaxy

作　　者：王戴木[1] 王竹平[2] 

机构地区：[1]阜阳师范学院物理系,阜阳236041 [2]安徽大学物理系,合肥230039

出　　处：《阜阳师范学院学报（自然科学版）》2005年第4期1-3,共3页Journal of Fuyang Normal University(Natural Science)

基　　金：安徽省自然科学基金资助项目(050460201)

摘　　要：使用一个动力学模型模拟研究表面剂诱导外延中二维岛的构型．在模型中,岛的形核和生长由增原子和表 面剂原子之间的交换过程控制．岛边缘交换垒依赖于表面剂台面上和表面剂层下最近邻原子数．模拟的岛形状和岛 密度随沉积率的演变能定性地解释近期的实验观察结果．The two-dimensional pattern formation in surfaetant mediated epitaxy has been studied by using a kinetic model, in which the nucleation and growth of the stable islands are controlled by the exchange process between surfaetant atoms and deposited atoms. The exchange barrier preventing an adatom from attaching to an existing island edge depends on the number of the nearest atoms above and below the surfactant layer. The simulation results can explain qualitatively recent experimental observations.

关 键 词：蒙特卡罗模拟 薄膜生长 分形 

分 类 号：O484.1[理学—固体物理]