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Updated: Jun 20, 2026

Fabrication of Low Temperature Carbon Nanotube Vertical Interconnects Compatible with Semiconductor Technology
Published on: December 7, 2015
Gate voltage controllable non-equilibrium and non-ohmic behavior in suspended carbon nanotubes
Adam W Bushmaker1, Vikram V Deshpande, Scott Hsieh
1Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, USA.
Abstract:
In this work, we measure the electrical conductance and temperature of individual, suspended quasi-metallic single-walled carbon nanotubes under high voltage biases using Raman spectroscopy, while varying the doping conditions with an applied gate voltage. By applying a gate voltage, the high-bias conductance can be switched dramatically between linear (Ohmic) behavior and nonlinear behavior exhibiting negative differential conductance (NDC). Phonon populations are observed to be in thermal equilibrium under Ohmic conditions but switch to nonequilibrium under NDC conditions. A typical Landauer transport model assuming zero bandgap is found to be inadequate to describe the experimental data. A more detailed model is presented, which incorporates the doping dependence in order to fit this data.
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