Electronic transport in copper-graphene composites

Abstract

We investigate the electronic transport properties of copper-graphene composites using a density-functional framework. Conduction in composites by varying the interface distance of a copper/graphene/copper (Cu/G/Cu) interface models was studied. The electronic density of states reveals increasing contributions from both copper and carbon atoms near the Fermi level with decreasing Cu-G interfacial distance. Electronic conductivity of the models computed using the Kubo-Greenwood formula showed the conductivity increases with decreasing Cu-G distance. We also find that the conductivity saturates below a threshold Cu-G distance. By computing the space-projected conductivity of the Cu/G/Cu models, we show that the graphene forms a bridge to the electronic conduction at small copper-graphene distances, thereby enhancing the conductivity.

References in corpus (4)

• Machine-Learning Interatomic Potentials Enable First-Principles Multiscale Modeling of Lattice Thermal Conductivity in Graphene/Borophene Heterostructures
• Kubo-Greenwood Electrical Conductivity Formulation and Implementation for Projector Augmented Wave Datasets
• Ab initio simulation of amorphous graphite
• Structural origins of electronic conduction in amorphous copper-doped alumina

Cited by in corpus (4)

• Physical origin of enhanced electrical conduction in aluminum-graphene composites
• Electronic Conductivity in Metal-Graphene Composites: The Role of Disordered Carbon Structures, Defects, and Impurities
• Site-projected Thermal Conductivity: Application to defects, interfaces, and homogeneously disordered materials
• Electrical Conductivity of Copper-Graphene (Cu-Gr) Composites: The Underlying Mechanisms of Ultrahigh Conductivity