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Title: Rectifying performance and negative differential behavior in graphite—chain—carbon nanotube junctions

In this paper, the (5, 5) capped carbon nanotubes (CNTs) in contact with different lengths of sp monoatomic chains grown on the surface of graphite substrate are fabricated and its electronic transport properties sandwiched between CNT and graphite electrodes are investigated. The first-principles calculations based on nonequilibrium Green's function in combination with density-functional theory show that their rectifying performance and negative differential resistance behavior are observed under very low biases and obviously are enhanced when the length increases. From our analysis, the charge transfer, transmission spectra, projected density of states and evolutions of molecular orbitals are responsible for these phenomena.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [1]
  1. Department of Mechanical Engineering, University of Wisconsin, Milwaukee, Wisconsin 53211 (United States)
  2. (China)
  3. School of Physics and Electronic Science, Changsha University of Science and Technology, Changsha 410114 (China)
  4. Department of Civil and Architectural Engineering, City University of Hong Kong, Kowloon (Hong Kong)
Publication Date:
OSTI Identifier:
22275817
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CARBON NANOTUBES; DENSITY FUNCTIONAL METHOD; ELECTRIC CONTACTS; GRAPHITE; GREEN FUNCTION; SUBSTRATES