Elimination of negative differential conductance in an asymmetric molecular transistor by an ac-voltage

Abstract

We analyze resonant tunneling subject to a non-adiabatic time-dependent bias-voltage through an asymmetric single molecular quantum dot with coupling between the electronic and vibrational degrees of freedom using a {\em Tien-Gordon-type} rate equation. Our results clearly exhibit the appearance of photon-assisted satellites in the current-voltage characteristics and the elimination of hot-phonon-induced negative differential conductance with increasing ac driving amplitude for an asymmetric system. This can be ascribed to an {\em ac-induced suppression} of unequilibrated (hot) phonons in an asymmetric system.

arXiv commentAccepted by Appl. Phys. Lett

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Cited by in corpus (4)

• Electron-vibration effects on the thermoelectric efficiency of molecular junctions
• Counting statistics of tunneling through a single molecule: effect of distortion and displacement of vibrational potential surface
• Phonon-assisted thermoelectric effects in a two-level molecule
• Robust negative differential conductance and enhanced shot noise in transport through a molecular transistor with vibration assistance