Franck-Condon blockade and giant Fano factors in transport through single molecules

Jens Koch*, Felix Von Oppen

*Corresponding author for this work

Research output: Contribution to journalArticle

402 Scopus citations

Abstract

We show that Franck-Condon physics leads to a significant current suppression at low bias voltages (termed Franck-Condon blockade) in transport through single molecules with strong coupling between electronic and vibrational degrees of freedom. Transport in this regime is characterized by remarkably large Fano factors (102-103 for realistic parameters), which arise due to avalanchelike transport of electrons. Avalanches occur in a self-similar manner over a wide range of time scales, leading to power-law dependences of the current noise on frequency and vibrational relaxation rate.

Original languageEnglish (US)
Article number206804
JournalPhysical review letters
Volume94
Issue number20
DOIs
StatePublished - May 27 2005

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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