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Measuring surface stress discontinuities in self-organized systems with X rays | B Croset
; Y Girard
; G Prévot
; M Sotto
; Y Garreau
; R Pinchaux
; M Sauvage-Simkin
; | Date: |
4 Feb 2002 | Journal: | Phys Rev Lett, 88 (5), 056103 | Abstract: | We have performed a grazing incidence x-ray diffraction study of the self-organized N/Cu(001) system. Diffraction satellites associated with self-organization are particularly intense around Bragg conditions of the bulk crystal. Bulk elastic relaxations due to surface stress discontinuities at domain boundaries are responsible for this feature. A quantitative analysis shows that these relaxations, computed by molecular dynamics or continuum elasticity, explain very well the whole diffraction study. A difference in surface stress of 7 N m(-1) between uncovered and N-covered regions of the Cu surface is shown to be the driving force for self-organization. | Source: | PubMed, pmid11863753 | Services: | Forum | Review | Favorites |
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