Conductance of a single-atom carbon chain with graphene leads

Abstract

We study the conductance of an interconnect between two graphene leads formed by a single-atom carbon chain. Its dependence on the chemical potential and the number of atoms in the chain is qualitatively different from that in the case of normal metal leads. Electron transport proceeds via narrow resonant states in the wire. The latter arise due to strong reflection at the junctions between the chain and the leads, which is caused by the small density of states in the leads at low energy. The energy dependence of the transmission coefficient near resonance is asymmetric and acquires a universal form at small energies. We find that in the case of leads with the zigzag edges the dispersion of the edge states has a significant effect on the device conductance.

9 pages, 4 figures

References in corpus (7)

• Electric Field Effect in Atomically Thin Carbon Films
• Quantum properties of atomic-sized conductors
• Ab-initio electron transport calculations of carbon based string structures
• Unusual conductance of polyyne-based molecular wires
• Electron-phonon scattering in quantum point contacts
• Fingerprints of mesoscopic leads in the conductance of a molecular wire
• Effect of electron and hole doping on the structure of C, Si, and S nanowires

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• Effects of Geometry and Symmetry on Electron Transport through Graphene-Carbon-Chain Junctions
• Long triple carbon chains formation by heat treatment of graphene nanoribbon: Molecular dynamics study with revised Brenner potential
• Magnetic and electronic properties of 1D hybrid nanoobjects composed of alternating polycyclic hydrocarbon regions and double carbon chains