Adatom motion to lattice steps: A direct view.
Adatom motion to lattice steps: A direct view.
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DOI：
10.1103/physrevlett.70.41
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发表时间：
1993-01
影响因子：
8.6
通讯作者：
Wang;Ehrlich
中科院分区：
文献类型：
--
作者：
Wang;Ehrlich
对单个铱原子在Ir（111）面上扩散的观察，发现铱团簇中心有一个空区，[类似于]3个最近邻间距。在这一地带，从未见过吸附原子。定量研究的原子在集群的概率纳入，被困在平面边缘的概率相比，表明，空区的出现，因为在集群附近，扩散向一个上升的步骤是更快的比在一个平坦的平台，使吸附原子漏斗到集群。
Observations of individual iridium atoms diffusing over Ir(111) planes with an iridium cluster at the center reveal an empty zone, [similar to]3 nearest-neighbor spacings wide, around the cluster. In this zone adatoms are never seen. Quantitative studies of the probability of atom incorporation at the cluster, compared to the probability of being trapped at the plane edge, suggest that the empty zone comes about because in the vicinity of the cluster, diffusion toward an ascending step is much more rapid than on a flat terrace, so that adatoms are funneled to the cluster.