Dresden 2017 – scientific programme
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O: Fachverband Oberflächenphysik
O 54: Metallic Nanowires on Semiconductor Surfaces
O 54.4: Poster
Tuesday, March 21, 2017, 18:30–20:30, P1C
Quantitative LEED studies on Si(111)-(5×2)-Au — •Andreas Alexander1, Frederic Timmer1, Joachim Wollschläger1, Kaori Seino2, and Friedhelm Bechstedt2 — 1Fachbereich Physik, Universität Osnabrück, Barbarastr. 7, 49076 Osnabrück — 2Institut für Festkörpertheorie und -optik, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena
The (5×2)-Au reconstruction on Si(111) has been in the focus of research for nearly 50 years now. Lately, in particular as a prototype for one-dimensional (1D) metallic chain structures. In order to understand the physical properties accompanying these 1D chains a profound knowledge of the atomic structure is needed. Historically, a plethora of atomic structures (EBH [1],AN [2],KK [3]) with varying Au coverages were discussed. More recently Shirasawa et al. [4] were able to show that Surface X-ray Diffraction experiments favor the KK-model slightly. Due to the higher surface sensitivity of Low Energy Electron Diffraction (LEED) as compared to SXRD we carried out quantitative LEED experiments in order to assess this observation.
[1] S. Erwin et al., Phys. Rev. B 80, 155409 (2009)
[2] T. Abukawa and Y. Nishigaya, Phys. Rev. Lett. 110, 036102 (2013)
[3] S. G. Kwon and M. H. Kang, Phys. Rev. Lett. 113, 086101 (2014)
[4] T. Shirasawa et al., Phys. Rev. Lett. 113, 165501 (2014)