A quasi-classical mapping approach to vibrationally coupled electron transport in molecular junctions.

نویسندگان

  • Bin Li
  • Eli Y Wilner
  • Michael Thoss
  • Eran Rabani
  • William H Miller
چکیده

We develop a classical mapping approach suitable to describe vibrationally coupled charge transport in molecular junctions based on the Cartesian mapping for many-electron systems [B. Li and W. H. Miller, J. Chem. Phys. 137, 154107 (2012)]. To properly describe vibrational quantum effects in the transport characteristics, we introduce a simple transformation rewriting the Hamiltonian in terms of occupation numbers and use a binning function to facilitate quantization. The approach provides accurate results for the nonequilibrium Holstein model for a range of bias voltages, vibrational frequencies, and temperatures. It also captures the hallmarks of vibrational quantum effects apparent in step-like structure in the current-voltage characteristics at low temperatures as well as the phenomenon of Franck-Condon blockade.

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عنوان ژورنال:
  • The Journal of chemical physics

دوره 140 10  شماره 

صفحات  -

تاریخ انتشار 2014