Anisotropy in nucleation and growth of two-dimensional islands during homoepitaxy on "hex" reconstructed Au(100).
Anisotropy in nucleation and growth of two-dimensional islands during homoepitaxy on "hex" reconstructed Au(100).
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“六角”重构 Au(100) 上同质外延期间二维岛的成核和生长的各向异性。
DOI：
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发表时间：
1994
影响因子：
8.6
通讯作者：
R. J. Behm
中科院分区：
文献类型：
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作者：
Sebastian Günther;E. Kopatzki;M. Bartelt;James W. Evans;R. J. Behm
我们提出了一项全面的扫描隧道显微镜研究结果，研究Au（100）上Au岛的成核和生长。结果表明，衬底的重构产生了较强的各向异性效应。岛密度对实验通量和温度依赖性的速率方程分析表明：(i) [ital i]= 315—380 K时临界尺寸为[ital i]=3，但[ital i][gt]3高于400 K；（ii）强各向异性扩散，优先平行于重建行（活化能[类似]0.2 eV）。我们评论了观测到的岛状各向异性的能量和动力学方面。
We present results of a comprehensive scanning tunneling microscopy study of the nucleation and growth of Au islands on Au(100). It is shown that the reconstruction of the substrate produces strong anisotropic effects. Rate equation analysis of the experimental flux and temperature dependence of the island density suggests: (i) a critical size of [ital i]=3 for [ital T]=315--380 K, but [ital i][gt]3 above 400 K; and (ii) strongly anisotropic diffusion, preferentially parallel to the reconstruction rows (activation energy [similar to]0.2 eV). We comment on energetic and kinetic aspects of the observed island shape anisotropy.