Polaronic effects induced by non-equilibrium vibrons in a single-molecule transistor

Abstract

Current-voltage characteristics of a single-electron transistor with a vibrating quantum dot were calculated assuming vibrons to be in a coherent (non-equilibrium) state. For a large amplitude of quantum dot oscillations we predict strong suppression of conductance and the lifting of polaronic blockade by bias voltage in the form of steps in $I-V$ curves. The height of the steps differs from the prediction of the Franck-Condon theory (valid for equilibrated vibrons) and the current saturates at lower voltages then for the case, when vibrons are in equilibrium state.

6 pages, 3 figures

References in corpus (5)

• Franck-Condon blockade and giant Fano factors in transport through single molecules
• Franck-Condon blockade in suspended carbon nanotube quantum dots
• Nanoelectromechanical coupling in fullerene peapods probed via resonant electrical transport experiments
• Phonon Squeezing in a Superconducting Molecular Transistor
• Interplay of Vibration and Coulomb Effects in Transport of Spin-Polarized Electrons in a Single-Molecule Transistor