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Electronic Transport in a New Type Nano-Junction: Carbon Atomic Chain Inserted Into a Carbon Nanotube

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Abstract:

We propose a new type of nano-junction, called HCS, which is made of a single carbon element, and can be looked as carbon atomic chain inserted into half of a single walled carbon nanotube. Using the tight-binding Green's function method, we report in detail the transport properties of (5,5) HCS, (8,0) HCS and (9,0) HCS. It is found that the conductance of the HCS is always smaller than the conductance of the perfect carbon nanotube and tube encapsulated chain structure. For (5,5) HCS, it has a nonzero conductance at the Fermi energy and the transmission has a resonant structure while the spectra of (5,5) single walled carbon nanotube and (5,5) tube encapsulated chain structure show step like feature. Though the (8,0) tube encapsulated chain structure possess a nonzero conductance at the Fermi energy, the conductance of (8,0) HCS drop to zero at the same energy region. For (9,0) HCS, there is also a gap in the conductance, which is different with that of tube encapsulating all chain structure.

Keywords: CARBON NANOTUBE; CONDUCTANCE; NANOJUNCTION; TIGHT-BINDING GREEN'S FUNCTION

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jctn.2012.1987

Publication date: January 1, 2012

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  • Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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