Early stages of oxidation of the Fe{001} surface: Atomic structure of the first monolayer
Early stages of oxidation of the Fe{001} surface: Atomic structure of the first monolayer
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Fe{001} 表面氧化的早期阶段：第一个单层的原子结构
DOI：
10.1103/physrevb.16.5271
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发表时间：
1977
影响因子：
3.7
通讯作者：
P. Marcus
中科院分区：
文献类型：
--
作者：
K. Legg;F. Jona;D. W. Jepsen;P. Marcus
用低能电子衍射(LEED)和俄歇电子能谱(俄歇电子能谱)研究了清洁的Fe{001}表面与氧气的反应。在完全单层覆盖下形成了Fe{0 0 1}1-ifmmodeElse\TextTimes\FI 1-O结构，而其他三个基团报道的Fe{0 0 1}$c(2\ifmmode\times\else\texttimes\fi{}2)\ensuremath{-}\mathrm{O}$结构不能被再现。对Fe{0 0 1}1 ifmmodeTimes Else TextTimesFI1-O结构的LEED结构分析表明，氧原子位于衬底表面的四重对称空洞的深处，第一衬底层间距相对于体相扩展了7.5%。该结构中氧原子的有效硬球半径为0.78\aa。结构分析的结果与前人报道的光电子能谱实验结果一致。
The reaction of a clean Fe{001} surface with oxygen gas was monitored with low-energy-electron diffraction (LEED) and Auger-electron spectroscopy. The formation of an Fe{001} 1 \ifmmode\times\else\texttimes\fi{} 1-O structure at full monolayer coverage was confirmed, whereas the Fe{001} $c(2\ifmmode\times\else\texttimes\fi{}2)\ensuremath{-}\mathrm{O}$ structure reported by three other groups could not be reproduced. A LEED structure analysis of the Fe{001} 1 \ifmmode\times\else\texttimes\fi{} 1-O structure revealed that the oxygen atoms are located deep inside the fourfold symmetrical hollows of the substrate surface, with the first substrate interlayer spacing 7.5% expanded with respect to the bulk. The effective hard-sphere radius of the oxygen atom in this structure is 0.78 \AA{}. The results of the structure analysis are consistent with the results of photoemission experiments reported by others.