Investigation of Transport Properties of Nanoribbons of γ-graphyne and graphdiyne by Tight-binding Model

Vahedi Fakhrabad, Davoud; Yeganeh, Mahboubeh

doi:10.22075/ppam.2026.41166.1227

Investigation of Transport Properties of Nanoribbons of γ-graphyne and graphdiyne by Tight-binding Model

Document Type : Original Article

Authors

Davoud Vahedi Fakhrabad ¹

Mahboubeh Yeganeh ²

¹ Physics Department, Faculty of Science, University of Neyshabur, Neyshabur, Iran

² School of Engineering, Kosar University of Bojnord, Bojnord, Iran

10.22075/ppam.2026.41166.1227

Abstract

In this work, transport properties of nanoribbons of two carbon allotropes, including γ-graphyne and graphdiyne, were investigated using a tight-binding model in the non-equilibrium Green's function. We considered the carbon allotropes γ-graphyne, and graphdiyne, which respectively consist of 48 and 72 carbon atoms and are confined to semi-infinite leads of the same material. The electron transport coefficient showed an almost step-like quantized plateau for γ-graphyne, and graphdiyne reaching a transmission coefficient of up to 3 for both samples. The calculated band structure revealed the semiconducting behavior of γ-graphyne, and graphdiyne nanoribbons with band gap energies of 0.32 and 0.57 eV, respectively. The higher band gap of graphdiyne compared to γ-graphyne results in lower electronic conduction and thermal conductivity near the Fermi level; however, at chemical potentials further apart from the Fermi level which can be attained by gating or doping, higher electronic conduction and thermal conductivity in graphdiyne can be achieved compared to γ-graphyne.

Keywords

Transport properties

Tight-binding model

graphyne

graphdiyne

Subjects

2D-Materials

© 2026 The Author(s). Progress in Physics of Applied Materials published by Semnan University Press. This is an open access article under the CC-BY 4.0 license. (https://creativecommons.org/licenses/by/4.0/)

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