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Electrical transport through heterojunctions of single-walled carbon/silicon carbide/carbon nanotubes
- Source :
- Journal of Applied Physics. 111:013704
- Publication Year :
- 2012
- Publisher :
- AIP Publishing, 2012.
-
Abstract
- The transport properties of heterojunctions composed of SiC nanotubes (SiCNTs) with different length coupled between metallic carbon nanotubes (CNTs) have been investigated using a combined density-functional theory and nonequilibrium Green’s function formalism. It is shown that the conductance of heterojunction decreases exponentially with the increasing length of SiCNT. The current-voltage curve of the system is linear for short SiCNT, but becomes gradually nonlinear for longer SiCNT, indicating a transition from metallic characteristics to semiconductor-like behavior. The observed trends can be understood by the electron tunneling between metallic CNTs. The present results provide insights into the physical mechanism of heterojunctions and are useful for their applications in electronic devices.
- Subjects :
- Materials science
Wide-bandgap semiconductor
General Physics and Astronomy
Conductance
Heterojunction
Nanotechnology
Carbon nanotube
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
law.invention
Metal
Condensed Matter::Materials Science
chemistry.chemical_compound
chemistry
Chemical physics
law
visual_art
visual_art.visual_art_medium
Silicon carbide
Density functional theory
Quantum tunnelling
Subjects
Details
- ISSN :
- 10897550 and 00218979
- Volume :
- 111
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Physics
- Accession number :
- edsair.doi...........ab341b7cf837dae8c18cbbe06fe5e267
- Full Text :
- https://doi.org/10.1063/1.3673793