AC Conductance of Finite-length Carbon Nanotubes

Details AC Conductance of Finite-length Carbon Nanotubes AC Conductance of Finite-length Carbon Nanotubes

2006-04-29

arxiv.org/abs/cond-mat/0605011v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 figures. A two-page abstract has been accepted by IEEE SISPAD 2006, CA, USA

Scientific paper

10.1088/0953-8984/18/39/003

We propose a nonequilibrium Green's function approach to calculate the ac conductance of various finite-length carbon nanotubes. The simulated ac conductance differs significantly from that of the infinite-length ones. At the low-frequency limit, the profiles of the quantized conductance are still observable in the finite-length carbon nanotubes, but many more peaks appear on the conductance curves. We also show that the conductance of finite-length carbon nanotubes will oscillate as a function of the ac frequency. The dependence of the oscillation on the lengths, helicities and defects of the carbon nanotubes are also investigated. The knowledge we gain from this research will help us make carbon-nanotube-based interconnects or other ac devices in the future

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