Quantum conductance of graphene nanoribbons with edge defects
By Tongcang Li, Shao-ping Lu. 2006
291 citations recorded by the source corpus.
The conductance of metallic graphene nanoribbons (GNRs) with single defects and weak disorder at their edges is investigated in a tight-binding model. We find that a single edge defect will induce quasi-localized states and consequently cause zero-conductance dips. The center energies and breadths of such dips are strongly dependent on the geometry of GNRs. Armchair GNRs are much more sensitive to a vacancy than zigzag GNRs, but are less sensitive to a weak scatter. More importantly, we find that with a weak disorder, zigzag GNRs will change from metallic to semiconducting due to Anderson localization. But a weak disorder only slightly affects the conductance of armchair GNRs. The influence of edge defects on the conductance will decrease when the widths of GNRs increase.
Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/0658c058cc475386cc0107b7faa68234f90cce9b
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In Atomic and Molecular Physics, and Optics
In Electrical and Electronic Engineering
In Materials Chemistry
Citations in the corpus
- Charge transport in disordered graphene-based low dimensional materials (2008, methodology): “This result can be explained by considering the high kinetic energy of the states around the CNP [ 143 ], which are therefore scarcely affected by potential fl uctuations.”
- Quantized conductance of a suspended graphene nanoconstriction (2011, background): “In such a narrow and long ribbon an edge disorder of typically only a few per cent of missing carbon atoms will prevent the observation of quantum ballistic transport and conductance quantizatio”