Imaging Pauli repulsion in scanning tunneling microscopy.
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.
Weiss
C
C
Institut für Bio- und Nanosysteme 3, Forschungszentrum Jülich, 52425 Jülich, Germany.
Wagner
C
C
Kleimann
C
C
Rohlfing
M
M
Tautz
F S
FS
Temirov
R
R