Temperature-dependent local geometries in the system Al(100)-c(2 x 2)-Na: A surface extended x-ray-absorption fine-structure study.
Temperature-dependent local geometries in the system Al(100)-c(2 x 2)-Na: A surface extended x-ray-absorption fine-structure study.
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Al(100)-c(2 x 2)-Na 系统中温度相关的局部几何形状：表面扩展 X 射线吸收精细结构研究。
DOI：
10.1103/physrevb.46.15594
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
Adams
中科院分区：
文献类型：
--
作者：
Aminpirooz;Schmalz;Becker;Pangher;Haase;Nielsen;Batchelor;Bogh;Adams
采用表面扩展x射线吸收精细结构实验研究了Na在Al（100）上在140和300 K下的吸附。对测量结果的分析表明，在每个温度下形成的c(2\ifmmode\乘以\else\texttimes\fi{}2)-Na相的局部几何形状是完全不同的。在140 K时，Na原子占据了四倍的空心位置，而在300 K时，Na原子位于重建的表面Al层下面的模型更有利。升温至300k时，低温结构向室温结构发生不可逆转变。
The adsorption of Na on Al(100) at 140 and 300 K has been studied by surface extended x-ray-absorption fine-structure experiments. An analysis of the measurements shows that the local geometry in the c(2\ifmmode\times\else\texttimes\fi{}2)-Na phases formed at each temperature is completely different. At 140 K the Na atoms occupy fourfold hollow sites, whereas at 300 K a model is favored where the Na atoms lie beneath a reconstructed surface Al layer. Warming to 300 K causes an irreversible transformation of the low-temperature structure to the room-temperature structure.