支撑异质外延平衡岛化现象中位错形核的两种途径
Two Approaches to Dislocation Nucleation in the Supported Heteroepitaxial Equilibrium Islanding Phenomenon
摘要：
我们用分子静力学方法和相场晶体学方法研究了二维纳米岛中位错的形成。结果发现，这两种方法表明相同的定性阶段的成核过程。位错在膜-基接触点处形核，当位错与岛-润湿膜接触点的距离大于最高能垒的距离时，位错能量单调减小。
英文摘要：
We study the dislocation formation in 2D nanoscopic islands with two methods, the Molecular Static method and the Phase Field Crystal method. It is found that both methods indicate the same qualitative stages of the nucleation process. The dislocations nucleate at the film-substrate contact point and the energy decreases monotonously when the dislocations are farther away from the island-wetting film contact points than the distance of the highest energy barrier.
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