Molecular attachment to a microscope tip: inelastic tunneling, Kondo screening, and thermopower

• Published in: Beilstein journal of nanotechnology Vol. 10; no. 1; pp. 1243 - 1250
• Main Authors: Tuerhong, Rouzhaji, Boero, Mauro, Bucher, Jean-Pierre
• Format: Journal Article
• Language: English
• Published: Germany Beilstein-Institut zur Föerderung der Chemischen Wissenschaften 2019; Karlsruhe Institute of Technology; Beilstein-Institut
• Subjects: Chemical Physics; Correlation analysis; Electron tunneling; Elementary excitations; Engineering Sciences; Excitation; Full Research Paper; inelastic electron tunneling; Kondo physics; Ligands; Magnetic properties; Manganese; Metal phthalocyanines; Micro and nanotechnologies; Microelectronics; molecular quantum dot; Nanoscience; Nanotechnology; Physical properties; Physics; single molecule; Spectrum analysis; Thermoelectricity; thermopower; Topography; Transport properties; tunnel junction; single molecule; inelastic electron tunneling; Kondo physics; thermopower; molecular quantum dot; tunnel junction
• ISSN: 2190-4286; 2190-4286
• DOI: 10.3762/bjnano.10.124

The vibrational excitation related transport properties of a manganese phthalocyanine molecule suspended between the tip of a scanning tunneling microsope (STM) and a surface are investigated by combining the local manipulation capabilities of the STM with inelastic electron tunneling spectroscopy. By attachment of the molecule to the probe tip, the intrinsic physical properties similar to those exhibited by a free standing molecule become accessible. This technique allows one to study locally the magnetic properties, as well as other elementary excitations and their mutual interaction. In particular a clear correlation is observed between the Kondo resonance and the vibrations with a strong incidence of the Kondo correlation on the thermopower measured across the single-molecule junction.