Electronic transport through magnetic molecules with soft vibrating modes

2007/11/02 by Pablo S. Cornaglia, P. S. Cornaglia, Gonzalo Usaj +1
Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Condensed matter physics #Coupling (piping) #Electrical resistivity and conductivity #Electrode #Kondo effect #Magnetic field #Materials science #Molecular Junctions and Nanostructures #Molecule #Physics #Quantum and electron transport phenomena #Quantum mechanics #Valence (chemistry) #cond-mat.mes-hall #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.76.241403

published as Phys. Rev. B 76, 241403(R) (2007) · 4 pages, 3 figures, accepted in PRB RC

arxiv created 2007/11/02 · openalex publication_date 2007/12/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

The low-temperature transport properties of a molecule are studied in the field-effect transitor geometry. The molecule has an internal mechanical mode that modulates its electronic levels and renormalizes both the interactions and the coupling to the electrodes. For a soft mechanical mode, the spin fluctuations in the molecule are dominated by the bare couplings, while the valence changes are determined by the dressed energies. In this case, the transport properties present an anomalous behavior and the Kondo temperature has a weak gate voltage dependence. These observations are in agreement with recent experimental data.

Citations

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