| Autor: |
V. L. Shneerson, Shougo Higashi, Dilano K. Saldin, Hiroshi Tochihara |
| Rok vydání: |
2008 |
| Předmět: |
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| Zdroj: |
Surface Science. 602:2473-2477 |
| ISSN: |
0039-6028 |
| DOI: |
10.1016/j.susc.2008.05.022 |
| Popis: |
We report on the re-determination of the structure of p(2 × 2)Sb/Cu(0 0 1) from measured LEED I/V data. The structure solution is performed in two steps. First an approximate “image” of the surface structure model is found by an application to the measured data of the recently-proposed Phase and Amplitude Recovery and Diffraction Image Generation Method (PARADIGM). This reveals that the p(2 × 2) structure is formed by the protrusion of one atom out of four in the outermost surface layer. Since an Sb atom is larger than one of Cu, this suggests a possibility that the p(2 × 2) structure is formed by Sb substitution for one out of four Cu atoms in the outermost layer. Second, a tensor LEED refinement of the model suggested by the PARADIGM yields the same dominant top-layer substitutional model proposed in the earlier LEED study, but with a much lower reliability factor, making much less likely an admixture of other surface phases. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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