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Published August 7, 2009 | public
Journal Article

Large Modulations in the Intensity of Raman-Scattered Light from Pristine Carbon Nanotubes

Abstract

Large modulations of up to 2 orders of magnitude are observed in the Raman intensity of pristine, suspended, quasimetallic, single-walled carbon nanotubes in response to applied gate potentials. No change in the resonance condition is observed, and all Raman bands exhibit the same changes in intensity, regardless of phonon energy or laser excitation energy. The effect is not observed in semiconducting nanotubes. The electronic energy gaps correlate with the drop in the Raman intensity, and the recently observed Mott insulating behavior is suggested as a possible explanation for this effect.

Additional Information

©2009 The American Physical Society. Received 8 January 2009; published 5 August 2009. This research was supported in part by DOE Grant No. DE-FG02-07ER46376 and the National Science Foundation Graduate Research Program.

Additional details

Created:
August 21, 2023
Modified:
October 18, 2023