| Autor: |
van Gastel, Raoul, Bartelt, N.C., Feibelman, P.J., Leonard, F., Kellogg, G.L. |
| Přispěvatelé: |
Physics of Interfaces and Nanomaterials, Faculty of Science and Technology |
| Rok vydání: |
2004 |
| Předmět: |
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| Zdroj: |
Physical review B: Condensed matter and materials physics, 70(24). American Physical Society |
| ISSN: |
1098-0121 |
| Popis: |
Pb deposition on Cu(111) causes the surface to self-assemble into periodically arranged domains of a Pb-rich phase and a Pb-poor phase. Using low-energy electron microscopy (LEEM) we provide evidence that the observed temperature-dependent periodicity of these self-assembled domain patterns is the result of changing domain-boundary free energy. We determine the free energy of boundaries at different temperatures from a capillary wave analysis of the thermal fluctuations of the boundaries and find that it varies from 22 meV/nm at 600 K to 8 meV/nm at 650 K. Combining this result with previous measurements of the surface stress difference between the two phases we find that the theory of surface-stress-induced domain formation can quantitatively account for the observed periodicities. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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