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arXiv · 0808.2600

Quantum transport through STM-lifted single PTCDA molecules

Florian Pump·Ruslan Temirov·Olga Neucheva·Serguei Soubatch·Stefan Tautz·Michael Rohlfing·Gianaurelio Cuniberti
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Abstract

Using a scanning tunneling microscope we have measured the quantum conductance through a PTCDA molecule for different configurations of the tip-molecule-surface junction. A peculiar conductance resonance arises at the Fermi level for certain tip to surface distances. We have relaxed the molecular junction coordinates and calculated transport by means of the Landauer/Keldysh approach. The zero bias transmission calculated for fixed tip positions in lateral dimensions but different tip substrate distances show a clear shift and sharpening of the molecular chemisorption level on increasing the STM-surface distance, in agreement with experiment.

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Florian Pump, Ruslan Temirov, Olga Neucheva, Serguei Soubatch, Stefan Tautz, Michael Rohlfing, Gianaurelio Cuniberti. 2008-08-19. Quantum transport through STM-lifted single PTCDA molecules. https://doi.org/10.1007/s00339-008-4837-z

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