Ehrlich-Schwoebel barrier and interface-limited decay in island kinetics on Ag(100)
Ehrlich-Schwoebel barrier and interface-limited decay in island kinetics on Ag(100)
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DOI：
10.1103/physrevb.85.045417
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发表时间：
2012-01-10
影响因子：
3.7
通讯作者：
Morgenstern, Karina
中科院分区：
文献类型：
--
作者：
Ge, Xin;Morgenstern, Karina
我们用快速扫描隧道显微镜研究了室温下Ag（100）表面尺寸约为10 ~ 1000 nm（2）的吸附原子和空位岛的扩散和衰减。原子和空位岛分别在扩散和附着极限中衰减。这种吸附原子驱动的动力学证实了在Ag（100）上存在Ehrlich-Schwoebel势垒。空位岛的扩散系数对岛的大小的依赖性是一致的扭结为主的周边扩散机制。定量差异，以前发表的工作进行了讨论。
We investigate diffusion and decay of adatom and vacancy islands on Ag(100) between approximate to 10 and approximate to 1000 nm(2) in size at room temperature by fast scanning tunneling microscopy. Adatom and vacancy islands decay in the diffusion and in the attachment limit, respectively. This adatom-driven kinetics confirms the existence of an Ehrlich-Schwoebel barrier on Ag(100). The dependence of the diffusivity of vacancy islands on island size is consistent with a kink-dominated periphery diffusion mechanism. Quantitative differences to previously published work are discussed.