Y Zhou et al 2008 J. Phys.: Condens. Matter 20 095209 doi:10.1088/0953-8984/20/9/095209
Resistance of copper nanowires and comparison with carbon nanotube bundles for interconnect applications using first principles calculations
Y Zhou1,3, S Sreekala1, P M Ajayan2 and S K Nayak1
Show affiliationsWe have studied the electronic properties and the band structure of copper nanowires for various diameters using first principles density functional methods and a supercell approach. The resistances of copper nanowires were computed on the basis of the Landauer formalism and compared with those obtained from an empirical approach. The fundamental resistances of small copper nanowires (~60 nm diameter) are found to be larger than those predicted by Ohm's law. In parallel, we have computed the fundamental resistances for bundles of single walled carbon nanotubes and compared them with that of a single copper wire of similar dimensions. We find that the resistance of carbon nanotube bundles is smaller than that of the copper wires for dimensions below 60 nm. Our results are discussed in light of recent experiments.
- PACS
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71.15.Mb Density functional theory, local density approximation, gradient and other corrections
72.15.Lh Relaxation times and mean free paths
73.63.-b Electronic transport in nanoscale materials and structures
- Subjects
- Dates
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Issue 9 (5 March 2008)
Received 31 October 2007, in final form 20 January 2008
Published 8 February 2008
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Resistance of copper nanowires and comparison with carbon nanotube bundles for interconnect applications using first principles calculations
Y Zhou et al 2008 J. Phys.: Condens. Matter 20 095209
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