Dresden 2011 – scientific programme

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O: Fachverband Oberflächenphysik

O 36: Poster Session II (Metals; Nanostructures at surfaces; Surface or interface magnetism; Spin-Orbit Interaction at Surfaces; Electron and spin dynamics; Surface dynamics; Methods; Theory and computation of electronic structure)

O 36.33: Poster

Tuesday, March 15, 2011, 18:30–22:00, P4

Structural transformation of the PTCDA/Ag(110) interface induced by potassium adsorption — •Martin Willenbockel¹, Giuseppe Mercurio¹, Oliver Bauer², Benjamin Fiedler², Christian Weiss¹, Ruslan Temirov¹, Sergey Subach¹, Moritz Sokolowski², and Stefan Tautz¹ — ¹Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany and JARA - Fundamentals of Future Information Technology — ²Institut für Physikalische und Theoretische Chemie, Universität Bonn, Wegelerstr. 12, 53115 Bonn, Germany

Using X-ray photoemission spectroscopy, scanning tunneling microscopy and low energy electron diffraction, the transformation of PTCDA/Ag(110) after deposition of potassium and subsequent annealing is studied. The initially planar molecule/metal interface undergoes significant structural modification: upon annealing, potassium atoms intercalate under the molecular layer partially unbinding PTCDA molecules from silver. This induces significant reorganization of the top-most silver layer resulting in the formation of silver terrace trains with K+PTCDA chains on top.