Conductance of a single-atom carbon chain with graphene leads

Wei Chen, A. V. Andreev, G. F. Bertsch

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)

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.

Original languageEnglish
Article number085410
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number8
DOIs
Publication statusPublished - 10 Aug 2009
Externally publishedYes

Fingerprint

Dive into the research topics of 'Conductance of a single-atom carbon chain with graphene leads'. Together they form a unique fingerprint.

Cite this