Structure of clusters on embedded-atom-method metal fcc (111) surfaces
| Autor: | Wingham Zhang, Li Zhao, Toshitaka Kojima, Lei Liu, Yufen Li, Jun Zhuang |
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| Rok vydání: | 2002 |
| Předmět: | |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 1095-3795 0163-1829 |
| Popis: | With a genetic algorithm, the structure of adatom clusters is optimized and studied systematically on different metal fcc (111) surfaces modeled by the embedded atom method. It is found that the various lowest-energy structures on the different surfaces can be explained in terms of the relative interaction range and the adatom-substrate interaction. The longer the relative interaction range becomes, the sharper or more extended the shape of the lowest-energy structure tends to be, in which the number of next-nearest-neighbor bonds decreases. When the compensation effect from the adatom-substrate interaction becomes strong, the configuration with the smaller number of nearest-neighbor bonds could be the lowest-energy structure; it also induces the shape of the lowest-energy structure as being sharp or extended. In this case, another interesting phenomenon is that the plane of the cluster is obviously bent. |
| Databáze: | OpenAIRE |
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