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

Ju Hee Back, Cheng Lin Tsai, Sunkook Kim, Saeed Mohammadi, Moonsub Shim

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish (US)
Article number215501
JournalPhysical review letters
Issue number21
StatePublished - Nov 16 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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