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O: Oberflächenphysik

O 14: Poster session I (Adsorption, Epitaxy and growth, Phase transitions, Surface reactions, Organic films, Electronic structure, Methods) (sponsored by Omicron Nanotechnology GmbH)

O 14.12: Poster

Montag, 27. März 2006, 18:00–21:00, P2

Role of elastic relaxations in reconstructed (2x1) O phase on Cu(110) studied by different coverages at room temperature and 600 K. — •Marina Moiseeva¹, Christian Bombis², and Harald Ibach¹ — ¹Institut fur Schichten und Grenzflähen ISG 3, Forschungszentrum Julich GmbH, 52425 Julich — ²Department of Physics and Astronomy, Ny Munkegade, Building 520,DK-Aarhus C, Denmark

The surface stress induced by self-assembly of (2x1)O on Cu(110)has been studied using bending bar technique. This technique makes enable to measure a substrate curvature and to characterise the surface by STM simultaneously.

In case of thermal equilibrium, according to the theory of Allerhand at al.[1] the domain wall energy β can be estimated to -0.16 meV/Å at RT and 0.02 meV/Å at 600 K. At both temperatures, compressive surface stresses decreases in its absolute value when Cu-O coverage increases. The influence of kinetic processes can be seen in an asymmetric shape of a stripe periodicity vs. coverage curve.

[1] O.L.Alerhand et al.Phys.Rev.Lett.61,1973(1988); V.I.Marchenko JETP, 79,257(1980)