Relationship between domain-boundary free energy and the temperature dependence of stress-domain patterns of Pb on Cu(111)

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Gastel van, R. and Bartelt, N.C. and Feibelman, P.J. and Leonard, F. and Kellogg, G.L. (2004) Relationship between domain-boundary free energy and the temperature dependence of stress-domain patterns of Pb on Cu(111). Physical Review B: Condensed matter and materials physics, 70 (24). p. 245413. ISSN 1098-0121

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Abstract: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.
Item Type:Article
Copyright:© 2004 The American Physical Society
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/49480
Official URL:http://dx.doi.org/10.1103/PhysRevB.70.245413
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Metis ID: 221921