A theoretical investigation on the transport properties of armchair biphenylene nanoribbons

TL;DR

This study uses density functional theory to analyze the electronic transport properties of armchair biphenylene nanoribbons, revealing their potential for ultra-small logic devices due to their semiconducting and metallic behaviors.

Contribution

It provides a theoretical investigation of biphenylene nanoribbons' electronic properties, highlighting their high mobility and negative differential resistance.

Findings

Semiconducting nanoribbons have a direct band gap >1 eV.

High electron mobility of 57174 cm2V-1s-1 in semiconducting nanoribbons.

Negative differential resistance observed with on/off ratios around 10^3.

Abstract

Armchair biphenylene nanoribbons are investigated by using density functional theory. The nanoribbon that contains one biphenylene subunit in a unit cell is a semiconductor with a direct band gap larger than 1 eV, while that containing four biphenylene subunits is a metal. The semiconducting nanoribbon has high electron mobility of 57174 cm2V-1s-1, superior to armchair graphene nanoribbons. Negative differential resistance behavior is observed in two electronic devices composed of the semiconducting and metallic nanoribbons. The on/off ratios are in the order of 10^3. All these indicate that armchair biphenylene nanoribbons are potential candidates for ultra-small logic devices.