Coherent transport through intramolecular junction of single-wall carbon nanotubes |
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Authors: | L Yang J Chen H Yang J Dong |
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Institution: | (1) Group of Computational Condensed Matter Physics, National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, PR China, CN |
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Abstract: | We have constructed four types single-wall carbon nanotube intramolecular junctions (IMJs) of (5,5)/(8,0), (5,5)/(10,0), (5,5)/(9,0)A, and (5,5)/(9,0)B along a common axis, and calculated their electronic and transport properties using a tight binding-based Green's function
approach that is particular suitable for realistic calculation of electronic transport property in extended system. Our results
show that quasi-localized states can appear in the metal/semiconductor heterojunctions ((5,5)/(8,0) and (5,5)/(10,0)junctions),
which is desirable for the design of a quantum device; and the conductance of M-M IMJs is very sensitive to the connectivity
of the matching tubes, certain configurations of connection completely stop the flow of electron, while others permit the
transmission of the current through the interface. These results may have implications for the device assembly and manipulation
process of all carbon nanotubes-based microelectronic elements.
Received 14 January 2003 / Received in final form 25 February 2003 Published online 4 June 2003
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ID="a"e-mail: lfyzz@yahoo.com.cn |
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Keywords: | PACS 71 15 Dx Computational methodology (Brillouin zone sampling iterative diagonalization pseudopotential construction) – 73 20 At Surface states band structure electron density of states – 73 40 -c Electronic transport in interface structures – 81 07 De Nanotubes |
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