Regensburg 2016 – scientific programme

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O: Fachverband Oberflächenphysik

O 18: Metallic Nanowires on Semiconductor Surfaces

O 18.7: Poster

Monday, March 7, 2016, 17:00–19:30, Poster A

SPA-LEED investigations of quasi one dimensional Dysprosiumsilicide structures on Si(001) — •Jascha Bahlmann, Frederic Timmer, and Joachim Wollschläger — Fachbereich Physik, Universität Osnabrück, Barbarastr. 7, 49069 Osnabrück, Germany

The investigation of rare earth metal induced nanowires on silicon is of particular interest due to their quasi one dimensional structure and the consequential electronic properties. Dy was deposited on flash-annealed Si(001) samples by means of physical vapor deposition (PVD) and examined by spot profile analysis low energy electron diffraction (SPA-LEED) as a function of the Dy coverage and the sample temperature.

(2×4)- and (2×7)-reconstructions are observed at lower coverages. The formation of these structures appears to be temperature-dependent. A bundling of the nanowires can be observed at sample temperatures of 500^∘ C and higher coverages. In addition mean domain sizes were determined in order to derive the optimal growth parameters for the nanowires.