Web Release Date: October 17,
Electronic Excitations of a Single Molecule Contacted in a Three-Terminal Configuration
rnholm, and
Kavli Institute of Nanoscience, Delft University of Technology, PO Box 5046, 2600 GA, The Netherlands, Institut für Theoretische Physik A, RWTH Aachen, 52056 Aachen, Germany and Institut für Festkörper-Forschung - Theorie 3, Forschungszentrum Jülich, D-52425 Jülich, Germany, and Nano-Science Center (Department of Chemistry and Niels Bohr Institute), University of Copenhagen, Universitetsparken 5, DK-2100, Copenhagen, Denmark
Received July 2, 2007
Revised September 27, 2007
Abstract:
Low-temperature three-terminal transport measurements through a thiol end-capped 
-conjugated molecule have been carried out. Electronic
excitations, including zero and finite-bias Kondo-effects, have been observed and studied as a function of magnetic field. Using a simplified
two-orbital model, we have accounted for the spin and the electronic configuration of the first four charge states of the molecule. The charge-dependent couplings to gate, source, and drain electrodes suggest a scenario in which charges and spins are localized at the ends of the
molecule, close to the electrodes.
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