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Simultaneous Synthesis of Single-walled Carbon Nanotubes and Graphene in a Magnetically-enhanced Arc Plasma
Published on: February 2, 2012
Dynamic conductance of carbon nanotubes
Roland1, Buongiorno Nardelli M, Wang
1Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA.
Physical Review Letters
|October 6, 2000
Summary
This study explores carbon nanotube dynamic conductance, revealing distinct AC responses due to displacement currents. Photon-assisted transport significantly impacts behavior, with implications for experimental applications.
Area of Science:
- Condensed matter physics
- Materials science
- Nanotechnology
Background:
- Carbon nanotubes (CNTs) exhibit unique electronic properties.
- Understanding their dynamic conductance is crucial for electronic device applications.
- Previous studies often focused on DC conductance, neglecting AC behavior.
Purpose of the Study:
- To investigate the dynamic conductance of carbon nanotubes under AC excitation.
- To analyze the influence of helicity, defects, and heterojunctions on AC response.
- To elucidate the role of photon-assisted transport in CNTs.
Main Methods:
- Utilized the nonequilibrium Green's function formalism.
- Employed a tight-binding model for electronic structure calculations.
- Simulated AC response for various CNT configurations.
Main Results:
- Dynamic conductance differs significantly from DC conductance.
- Observed both capacitive and inductive responses in CNTs.
- Demonstrated the critical role of photon-assisted transport.
Conclusions:
- Displacement currents induce unique AC behaviors in CNTs.
- Photon-assisted transport is a key factor in CNT dynamic conductance.
- Findings provide insights for designing CNT-based electronic devices.
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