Quantum inelastic conductance through molecular wires

Details Quantum inelastic conductance through molecular wires Quantum inelastic conductance through molecular wires

1999-03-21

arxiv.org/abs/cond-mat/9903320v2

Physics

Condensed Matter

Materials Science

4 pages, 4 figures, accepted for publication in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.83.452

We calculate non-perturbatively the inelastic effects on the conductance through a conjugated molecular wire-metal heterojunction, including realistic electron-phonon coupling. We show that at sub-band-gap energies the current is dominated by quantum coherent transport of virtual polarons through the molecule. In this regime, the tunneling current is strongly increased relative to the case of elastic scattering. It is essential to describe the full quantum coherence of the polaron formation and transport in order to obtain correct physics. Our results are generally applicable to one-dimensional atomic or molecular wires.

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