Electron Transport through a Molecular Conductor with Center-of-Mass Motion

Details Electron Transport through a Molecular Conductor with Center-of-Mass Motion Electron Transport through a Molecular Conductor with Center-of-Mass Motion

2005-04-20

arxiv.org/abs/cond-mat/0504528v2

Phys. Rev. Lett. 95, 256807 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevLett.95.256807

The linear conductance of a molecular conductor oscillating between two metallic leads is investigated numerically both for Hubbard interacting and noninteracting electrons. The molecule-leads tunneling barriers depend on the molecule displacement from its equilibrium position. The results present an interesting interference which leads to a conductance dip at the electron-hole symmetry point, that could be experimentally observable. It is shown that this dip is caused by the destructive interference between the purely electronic and phonon-assisted tunneling channels, which are found to carry opposite phases. When an internal vibrational mode is also active, the electron-hole symmetry is broken but a Fano-like interference is still observed.

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