Relationship between domain boundary free energy and the temperature dependence of stress-domain patterns of Pb on Cu(111).
- Sandia National Laboratories, Livermore, CA
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.
- Research Organization:
- Sandia National Laboratories
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 952817
- Report Number(s):
- SAND2004-2841J
- Journal Information:
- Proposed for publication in Physical Review B., Journal Name: Proposed for publication in Physical Review B.
- Country of Publication:
- United States
- Language:
- English
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