Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 42: Poster: Organic-Inorganic Hybrid Systems and Organic Films
O 42.16: Poster
Dienstag, 13. März 2018, 18:15–20:30, Poster A
Structural investigation of highly ordered incommensurate monolayer domains of C60 on Ag(111) — •Marco Gruenewald, Philipp Müller, Falko Sojka, Jari Domke, Roman Forker, and Torsten Fritz — Institute of Solid State Physics, Friedrich Schiller University Jena
We structurally investigated monolayers of C60 on Ag(111), which have been prepared by annealing of multilayers, by means of low energy electron diffraction (LEED) and scanning tunneling microscopy (STM). We find that depending on the annealing temperature either the well-known commensurate (2√3×2√3)R30∘ structure [E. I. Altman and R. J. Colton, Phys. Rev. B 48, 18244 (1993)] or previously unknown incommensurate phases are formed. More precisely, a whole family of differently rotated structures could be observed for the latter with domain angles quasi-continuously ranging from 0∘ to 13.2∘ while the other unit cell parameters are essentially unaltered compared with the commensurate phase. By means of STM we find that the molecules appear differently rotated on the surface, most likely owing to their inequivalent adsorption sites.