Intrinsic Properties of Bipolarons in Armchair Graphene Nanoribbons

TL;DR

This paper investigates bipolaron dynamics in armchair graphene nanoribbons, revealing their effective mass and velocity under various conditions, and compares their mobility to that in conjugated polymers.

Contribution

It provides new insights into bipolaron behavior in AGNRs, including their effective mass and mobility, under different electric and electron-phonon coupling regimes.

Findings

Bipolarons in narrower AGNRs move as fast as those in conjugated polymers.

The study determines the effective mass and terminal velocity of bipolarons in AGNRs.

Electric field and electron-phonon coupling significantly influence bipolaron dynamics.

Abstract

We performed an investigation concerning bipolaron dynamics in armchair graphene nanoribbons (AGNRs) under the influence of different electric field and electron-phonon coupling regimes. By studying the response to the electric excitation, we were able to determine the effective mass and terminal velocity of this quasiparticle in AGNRs. Remarkably, bipolarons in narrower AGNRs move as fast as the ones in conjugated polymers. Our findings pave the way to enhance the understanding of the behavior of charge carriers in graphene nanoribbons.