title: Manifestation of Kohn anomaly in 1/f fluctuations in metallic carbon nanotubes.
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.
authors.affiliation: Department of Materials Science and Engineering, University of Illinois, Urbana, Illinois 61801, USA.
authors.forename: Ju Hee
authors.initials: JH
authors.lastname: Back
authors.forename: Cheng-Lin
authors.initials: CL
authors.lastname: Tsai
authors.forename: Sunkook
authors.initials: S
authors.lastname: Kim
authors.forename: Saeed
authors.initials: S
authors.lastname: Mohammadi
authors.forename: Moonsub
authors.initials: M
authors.lastname: Shim