Berlin 2005 – wissenschaftliches Programm

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O: Oberflächenphysik

O 15: Postersitzung (Adsorption an Oberfl
ächen, Epitaxie und Wachstum, Organische Dünnschichten, Oxide und Isolatoren, Rastersondentechniken, Zeitaufgelöste Spektroskopie, Methoden)

O 15.11: Poster

Freitag, 4. März 2005, 17:00–20:00, Poster TU D

Study of conductivity and surface morphology during adsorption of silver atoms on a smooth Ag(111) film — •Giriraj Jnawali, Boris Krenzer, and M. Horn-von Hoegen — Institute for Laser and Plasma Physics, University of Duisburg-Essen, Essen, Germany

The conductivity of ultra-thin metal film has great relevance to technological applications. In contrast to thin metal film, the surface morphology has an enhanced impact on the electronic transport through the film.

In this poster we’ll present the results of conductivity measurements along with morphology study of ultra-thin metal films. The conductivity measurements were performed by four-point resistance measurements and the morphology was studied by SPA-LEED.

Ultra-thin Ag(111) films were prepared by depositing silver atoms on Si(100) substrate at 80K and annealed the film carefully until it turned into flat surface. The quality of flatness was checked by SPA-LEED measurements. Subsequently the film was exposed to a low dose silver atoms at different substrate temperatures ranging from 80 to 200K. An increase in resistance due to scattering at adsorbate atoms was observed. The resistance measurements were accompanied by SPA-LEED to determine the surface roughness.