Berlin 2015 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 41: Inorganic/Organic Interfaces

O 41.25: Poster

Dienstag, 17. März 2015, 18:15–21:00, Poster B

Investigation of molecular hydrogen in a tunneling junction using STS — •Simon Röger, Matthias Stocker, and Berndt Koslowski — Universität Ulm, Ulm, Germany

Functionalization of probes is widely used in Scanning Probe Microscopy to enhance the spatial resolution of the instrument. This is especially important when determining the intramolecular structure of adsorbed molecules. In Scanning Tunneling Microscopy, molecular hydrogen physisorbed at the sample surface can be exploited to enhance the lateral contrast greatly. However, the physical origin of that phenomenon is not really understood, yet. We use Scanning Tunneling Spectroscopy to elucidate the specific influence of hydrogen on tunneling electrons. We speculate that the hydrogen modifies the electromagnetic environment of tunneling electrons by its dynamic properties.