Kinetics of the (7 × 7) (1 × 1) Transition on Si(111)
Kinetics of the (7 × 7) (1 × 1) Transition on Si(111)
复制标题
Si(111) 上 (7 × 7) (1 × 1) 跃迁的动力学
DOI：
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
E. Bauer
中科院分区：
文献类型：
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作者：
W. Telieps;E. Bauer
通过低能电子反射显微镜（LEERM）原位研究了（7×7）（1×1）相变。观察到单原子步骤中 (7 × 7) 域的异质成核以及原子平坦平台中的均质成核。核密度和域生长速度随着表面过冷ΔT的增加而增加。磁畴在低 ΔT 时开始以三角形平衡形状生长；相邻域的相互作用导致树突状的整体形状。这些观察有力地支持了这种转变是首要的观点。
The (7 × 7) (1 × 1) phase transition was investigated in situ by low energy electron reflection microscopy (LEERM). Heterogeneous nucleation of the (7 × 7) domains at monoatomic steps is observed as well as homogeneous nucleation in the atomically flat terraces. The density of nuclei and the domain growth velocity increase with the supercooling ΔT of the surface. The domains start to grow at low ΔT in triangular equilibrium shape; interaction of neighbouring domains leads to a dendritic overall shape. The observations strongly support the view that the transition is of first order.