Regensburg 2010 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 41: Poster Session I (Semiconductor Substrates: Epitaxy and growth; Semiconductor Substrates: Adsorbtion; Semiconductor Substrates: Solid-liquid interfaces; Semiconductor Substrates: Clean surfaces; Oxides and insulators: Epitaxy and growth; Oxides and insulators: Adsorption; Oxides and insulators: Clean surfaces; Organic, polymeric and biomolecular films - also with adsorbates; Organic electronics and photovoltaics, Surface chemical reactions; Heterogeneous catalysis; Phase transitions; Particles and clusters; Surface dynamics; Surface or interface magnetism; Electron and spin dynamics; Spin-Orbit Interaction at Surfaces; Electronic structure; Nanotribology; Solid/liquid interfaces; Graphene; Others)

O 41.79: Poster

Dienstag, 23. März 2010, 18:30–21:00, Poster B1

Surface resistivity of Cu ultrathin films due to impurity scattering — •Swantje Heers, Phivos Mavropoulos, Samir Lounis, and Stefan Blügel — Institut für Festkörperforschung and Institute for Advanced Simulation, Forschungszentrum Jülich, 52425 Jülich

In order to understand resistivity measurements on an atomic scale in ultrathin films, it is of crucial importance to investigate the influence of scattering at surface defects on the surface resistivity, especially in the presence of surface bands. Using the Korringa-Kohn-Rostoker Green function method [1] and solving the Boltzmann-equation self-consistently, the surface resistivity can be calculated for adatoms, impurities and vacancies in and below the surface. We have performed density-functional calculations for the Cu(111) surface of finite-thickness slabs with 3d and 4sp atoms as impurities. The thickness of the slab is varied, ranging from six to forty atomic layers. Our formalism allows us to separate the contribution by scattering to bulk states from the one by scattering to surface states. We show that trends are qualitatively different for adatoms, compared to impurities in the surface. This work was supported by the ESF EUROCORES Programme SONS under contract N. ERAS-CT-2003-980409 and the Priority Programme SPP1153 of the DFG grand Bl 444/8-1.
N. Papanikolaou, R. Zeller, P. H. Dederichs J. Phys.: Condens. Matter 14, 2799 (2002).