2018/01/01 by Miguel A. Sierra, David Sánchez, Alvar R. Garrigues +3 · 5 citations
Chemistry · Engineering · Materials Science · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Charge (physics) #Conductance #Coulomb #Degeneracy (biology) #Magnetic field #Magnetism in coordination complexes #Molecular Junctions and Nanostructures #Molecule #Resonance (particle physics) #Thermal conduction #cond-mat.mes-hall
paper · pdf · doi:10.1039/c7nr05739c
published in Nanoscale 10(8), 3904-3910 (Royal Society of Chemistry) · Main text: 7 pages, 5 figures; SI: 2 pages, 2 figures. Accepted to RSC Nanoscale
openalex publication_date 2018/01/01 · arxiv created 2018/01/23 · openalex created_date 2018/02/02 · arxiv updated 2018/02/23 · openalex updated_date 2026/08/05
Recent experiments demonstrate a temperature control of the electric conduction through a ferrocene-based molecular junction. Here we examine the results in view of determining means to distinguish between transport through single-particle molecular levels or via transport channels split by Coulomb repulsion. Both transport mechanisms are similar in molecular junctions given the similarities between molecular intralevel energies and the charging energy. We propose an experimentally testable way to identify the main transport process. By applying a magnetic field to the molecule, we observe that an interacting theory predicts a shift of the conductance resonances of the molecule whereas in the noninteracting case each resonance is split into two peaks. The interaction model works well in explaining our experimental results obtained in a ferrocene-based single-molecule junction, where the charge degeneracy peaks shift (but do not split) under the action of an applied 7-Tesla magnetic field. This method is useful for a proper characterization of the transport properties of molecular tunnel junctions.