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Negative differential resistance in nanotube devices
1IBM Research Division, T. J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598, USA.
Physical Review Letters
|November 18, 2000
Summary
Carbon nanotube junctions show negative differential resistance, ideal for electronics. Undoped metal-nanotube-metal junctions are promising for device integration due to high performance at room temperature.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Carbon nanotubes (CNTs) are explored for advanced electronic applications.
- Negative differential resistance (NDR) is a key property for novel electronic devices.
Purpose of the Study:
- To investigate the potential of carbon nanotube junctions for negative differential resistance (NDR).
- To evaluate both p-n junctions and metal-nanotube-metal junctions for electronic applications.
Main Methods:
- Utilized quantum transport calculations.
- Employed a self-consistent potential approach.
- Applied the tight-binding approximation for modeling.
Main Results:
- Predicted NDR in carbon nanotube junctions at room temperature.
- Observed very high peak-to-valley current ratios.
- Identified undoped metal-nanotube-metal junctions as particularly promising.
Conclusions:
- Carbon nanotube junctions exhibit significant NDR, suitable for high-performance electronics.
- Undoped metal-nanotube-metal junctions show potential for practical device integration.