title: 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 ultrahigh 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 and transducer is identified. It probes the short-range Pauli repulsion and converts this signal into variations of the junction conductance.
authors.affiliation: Institut für Bio- und Nanosysteme 3, Forschungszentrum Jülich, 52425 Jülich, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Weiss
authors.forename: C
authors.initials: C
authors.lastname: Wagner
authors.forename: C
authors.initials: C
authors.lastname: Kleimann
authors.forename: M
authors.initials: M
authors.lastname: Rohlfing
authors.forename: F S
authors.initials: FS
authors.lastname: Tautz
authors.forename: R
authors.initials: R
authors.lastname: Temirov