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Title: Carbon doping induced peculiar transport properties of boron nitride nanoribbons p-n junctions

By applying nonequilibrium Green's function combined with density functional theory, we investigate the electronic transport properties of carbon-doped p-n nanojunction based on hexagonal boron nitride armchair nanoribbons. The calculated I-V curves show that both the center and edge doping systems present obvious negative differential resistance (NDR) behavior and excellent rectifying effect. At low positive bias, the edge doping systems possess better NDR performance with larger peak-to-valley ratio (∼10{sup 5}), while at negative bias, the obtained peak-to-valley ratio for both of the edge and center doping systems can reach the order of 10{sup 7}. Meanwhile, center doping systems present better rectifying performance than the edge doping ones, and giant rectification ratio up to 10{sup 6} can be obtained in a wide bias range. These outstanding transport properties are explained by the evolution of the transmission spectra and band structures with applied bias, together with molecular projected self-consistent Hamiltonian eigenvalues and eigenstates.
Authors:
 [1] ;  [2] ; ; ; ; ;  [1] ;  [3]
  1. School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074 (China)
  2. (China)
  3. College of Physics and Electronic Science, Hubei Normal University, Huangshi 435002 (China)
Publication Date:
OSTI Identifier:
22308728
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; 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:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BORON NITRIDES; CARBON ADDITIONS; DENSITY FUNCTIONAL METHOD; DOPED MATERIALS; EIGENSTATES; EIGENVALUES; ELECTRIC CONDUCTIVITY; GREEN FUNCTION; HAMILTONIANS; NANOSTRUCTURES; P-N JUNCTIONS; SPECTRA; TRANSMISSION