Applied Physics A

, Volume 93, Issue 2, pp 335–343

Quantum transport through STM-lifted single PTCDA molecules

  • Florian Pump
  • Ruslan Temirov
  • Olga Neucheva
  • Serguei Soubatch
  • Stefan Tautz
  • Michael Rohlfing
  • Gianaurelio Cuniberti
Article

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.

PACS

68.37.Ef 81.07.Pr 73.63.-b 68.43.Bc 85.85.+j 

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Florian Pump
    • 1
  • Ruslan Temirov
    • 2
  • Olga Neucheva
    • 2
  • Serguei Soubatch
    • 2
  • Stefan Tautz
    • 2
  • Michael Rohlfing
    • 3
  • Gianaurelio Cuniberti
    • 1
  1. 1.Institute for Materials Science and Max Bergmann Center of BiomaterialsDresden University of TechnologyDresdenGermany
  2. 2.Institut für Bio-und Nanosysteme 3, JARAForschungszentrum JülichJülichGermany
  3. 3.Department of PhysicsUniversity of OsnabrückOsnabrückGermany

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