Imaging Pauli repulsion in scanning tunneling microscopy

Abstract

A scanning tunneling microscope (STM) has been equipped with a nanoscale force sensor and signal transducer composed of a single D2 molecule that is confined in the STM junction. The uncalibrated sensor is used to obtain ultra-high geometric image resolution of a complex organic molecule adsorbed on a noble metal surface. By means of conductance-distance spectroscopy and corresponding density functional calculations the mechanism of the sensor/transducer is identified. It probes the short-range Pauli repulsion and converts this signal into variations of the junction conductance.

4 pages, 4 figures, accepted to Phys. Rev. Lett

References in corpus (2)

• Vibrationally Induced Two-Level Systems in Single-Molecule Junctions
• Huge negative differential conductance in Au-H2 molecular nanojunctions

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