Manifestation of Kohn Anomaly in 1/f Fluctuations in Metallic Carbon Nanotubes

Author

• Ju Hee Back, University of Illinois at Urbana-Champaign
• Cheng-Lin Tsai, University of Illinois at Urbana-Champaign
• Sunkook Kim, Purdue University - Main Campus
• Saeed Mohammadi, School of Electrical and Computer Engineering, Purdue UniversityFollow
• Moonsub Shim, University of Illinois at Urbana-Champaign

Abstract

Low-frequency noise in metallic single walled carbon nanotubes is shown to be strongly dependent on the Fermi level position and the applied electric field across the nanotube. Resonance-like enhancement observed near optical phonon energy only when the Fermi level lies near the Dirac point is correlated to Raman G-band softening and broadening. The results suggest that the competition between zone-center and zone-boundary phonon scattering is the underlying origin of the large enhancement and resonance-like behavior of 1/f noise.

Keywords

NOISE; TRANSISTORS; DEVICES

Citation

PRL 103, 215501 (2009)

Date of this Version

11-20-2009

Recommended Citation

Back, Ju Hee; Tsai, Cheng-Lin; Kim, Sunkook; Mohammadi, Saeed; and Shim, Moonsub, "Manifestation of Kohn Anomaly in 1/f Fluctuations in Metallic Carbon Nanotubes" (2009). Birck and NCN Publications. Paper 474.
https://docs.lib.purdue.edu/nanopub/474