Elastic displacements and step interactions on metallic surfaces: GIXD and ab initio study of Au(332)
| Autor: | Prévot, Geoffroy, Girard, Yann, Repain, Vincent, Rousset, Sylvie, Coati, Alessandro, Garreau, Yves, Paul, Jaita, Mammen, Nisha, Narasimhan, Shobhana |
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| Přispěvatelé: | Institut des Nanosciences de Paris (INSP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Matériaux et Phénomènes Quantiques (MPQ (UMR_7162)), Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) |
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Physical Review B: Condensed Matter and Materials Physics (1998-2015) Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2010, 81 (7), pp.075415. ⟨10.1103/PhysRevB.81.075415⟩ Physical Review B : Condensed matter and materials physics Physical Review B : Condensed matter and materials physics, American Physical Society, 2010, 81 (7), pp.075415. ⟨10.1103/PhysRevB.81.075415⟩ Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2010, 81 (7), pp.075415. ⟨10.1103/PhysRevB.81.075415⟩ |
| ISSN: | 1098-0121 1550-235X 0163-1829 1095-3795 |
| DOI: | 10.1103/PhysRevB.81.075415⟩ |
| Popis: | International audience; We have studied the energetics, relaxation and interactions of steps on the Au(332) vicinal surface, using a combination of grazing incidence X-ray diffraction (GIXD), anisotropic linear elasticity (ALE) theory, and ab initio density functional theory (DFT). We find that the initial force distribution on a bulk-truncated surface, as well as the resulting pattern of atomic relaxations, can be reproduced excellently by a buried dipole elastic model. The close agreement obtained between experimental and calculated X-ray diffraction profiles allows us to precisely determine the value of the elastic dipole density at the steps. We also use these results to obtain an experimental estimate of the surface stress on an unreconstructed Au(111) facet, 2.3+/-0.4 Nm-1, and the value of the step-step elastic interaction energy: 950 +/- 150 meV.Å. |
| Databáze: | OpenAIRE |
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