Cu(111)表面氙层的研究

J. Jupille, J. Ehrhardt, D. Fargues, A. Cassuto
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引用次数: 20

摘要

用SEXAFS研究了Cu(111)表面在单层和多层范围内对氙的吸附。在18 ~ 47 K的温度范围内,Xe单层被证明是不相称的,因为(i) Xe - Xe间距不同于容易的三次空心点之间的距离(aCu√3),(ii) Xe单层的热膨胀系数远高于铜。此外,我们还发现了一个0.345 nm的Xe-Cu距离,这与硬球模型确定的值比较好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study of xenon layers on a Cu(111) surface
The adsorption of xenon has been studied by SEXAFS on a Cu(111) surface in the monolayer and in the multilayer range. At temperatures ranging between 18 and 47 K, the Xe monolayer has been shown to be incommensurate because (i) the Xe—Xe spacing differs from the distance between easy three-fold-hollow sites (aCu√3) and (ii) the coefficient of thermal expansion of the Xe adlayer is much higher than that of copper. In addition, we have found an Xe—Cu distance of 0.345 nm, which compares well with the value determined by a hard-sphere model.
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