Charge Transport Mechanism in Chevron--Graphene Nanoribbons

TL;DR

This paper investigates charge transport in Chevron-graphene nanoribbons, revealing a doping-dependent phase transition affecting charge carrier behavior and mobility, with implications for nanoscale electronic device performance.

Contribution

It provides the first detailed analysis of charge transport mechanisms and phase transitions in C-GNRs, highlighting differences from standard graphene nanoribbons.

Findings

Charge carriers undergo a phase transition influenced by doping levels.

Doping significantly alters the conduction regime in C-GNRs.

Transport properties differ markedly from those in standard graphene nanoribbons.

Abstract

From the moment atomic precision control of the growth process of graphene was achieved, more elaborated carbon allotropes were proposed opening new channels for flat optoelectronics at the nanoscale. A special type of this material presenting a V-shape (or "kinked" pattern) was recently synthesized and named Chevron-graphene nanoribbons (C-GNRs). To realize the reach of C--GNRs in developing new applications, the formation, and transport of charge carriers in their lattices should be primarily understood. Here, we investigate the static and dynamical properties of quasiparticles in C-GNRs. We study the effects of electron-phonon coupling and doping on the system. We also determine the kind of charge carriers present in C--GNR. It is observed that a phase transition occurs between a delocalized regime of conduction and regimes mediated by charge carriers. Such a phase transition is highly dependent on the doping concentration. Remarkably, crucial differences from the transport in standard graphene nanoribbons are identified. These factors are noted to have a profound impact on the mobility on the system which, in turn, should decisively impact the performance of electronic devices based on C-GNRs.