Journal
APPLIED PHYSICS LETTERS
Volume 102, Issue 20, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4807284
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Electronic transport properties of armchair graphene nanoribbon and capped carbon nanotube junctions, covalently bridged by carbon atomic chains with different numbers of carbon atoms, are investigated. The first-principles calculations based on non-equilibrium Green's functions with the density-functional theory show that their I-V characteristics display odd-even effects and rectifying behaviors show obvious oscillations, namely, different bond patterns for even- and odd-numbered carbon chains affect the contact bonds, charge transfer, density of states, evolutions of molecular orbitals, and rectifying performance. (C) 2013 AIP Publishing LLC.
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