Dresden 2009 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 11: Metal substrates: Adsorption of organic / bio molecules II

O 11.6: Vortrag

Montag, 23. März 2009, 16:15–16:30, SCH A118

Structure microscopy attributed to hydrogen — •Christian Weiss, Ruslan Temirov, Olga Neucheva, Sergey Soubatch, and Frank Stefan Tautz — Institut für Bio und Nanosysteme (IBN-3) and JARA-Fundamentals of Future Information Technology

Condensation of H2 (D2) leads to ultra-high geometrical resolution in low temperature scanning tunneling microscopy. This has been shown for different molecular adsorbates on different metallic surfaces [1]. Geometrical resolution in this context means that ring-structures in which carbon atoms in many organic molecules are arranged can be clearly identified. Strong non-linear behavior in conductance spectra appears simultaneously with high resolution images, when hydrogen is condensed to the tunnelling junction. In this contribution we analyze the relation between spectroscopic features and imaging contrast to elucidate the specific feature that is responsible for the improved resolution. References: [1] R Temirov, S Soubatch, O Neucheva, A Lassise, and F S Tautz 2008 New. J. Phys 10 053012