Light Induced Negative Differential Conductance in Molecular Junctions: Role of Triplet States and Electron-Phonon Interaction

TL;DR

This paper theoretically demonstrates light-induced negative differential conductance in molecular junctions due to electron-phonon interactions and triplet state transitions, analyzing effects of light and temperature.

Contribution

It introduces a novel mechanism for negative differential conductance involving triplet states and electron-phonon coupling in molecular junctions.

Findings

Negative differential conductance can be induced by light in molecular junctions.

Triplet state transitions play a crucial role in the conductance behavior.

Light intensity and temperature significantly influence the phenomenon.

Abstract

In this work we theoretically consider the OPE-3 molecule bridging two metallic leads and show that because of the electron-phonon interaction and the transition of cation to triplet states, we can have a light induced negative differential conductance. Furthermore, we investigate the effects of light intensity and temperature on this phenomena.