Imaging Pauli Repulsion in Scanning Tunneling Microscopy
C. Weiss1,2, C. Wagner1,2, C. Kleimann1,2, M. Rohlfing3, F. S. Tautz1,2, and R. Temirov1,2
1Institut für Bio- und Nanosysteme 3, Forschungszentrum Jülich, 52425 Jülich, Germany
2JARA-Fundamentals of Future Information Technology, 52425, Jülich, Germany
3Fachbereich Physik, Universität Osnabrück, 49069 Osnabrück, Germany
Received 10 December 2009; revised 12 February 2010; published 20 August 2010
Phys. Rev. Lett. 105, 086103 (2010)
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.
© 2010 The American Physical Society
URL: http://link.aps.org/doi/10.1103/PhysRevLett.105.086103
DOI: 10.1103/PhysRevLett.105.086103
PACS: 68.37.Ef, 68.37.Ps, 67.63.Cd
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