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Published December 2007 | public
Journal Article

Direct Observation of Mode Selective Electron−Phonon Coupling in Suspended Carbon Nanotubes

Abstract

Raman spectra of individual pristine suspended single-walled carbon nanotubes are observed under high electrical bias. The LO and TO modes of the G band behave differently with respect to voltage bias, indicating preferential electron−phonon coupling and nonequilibrium phonon populations, which cause negative differential conductance in suspended devices. By correlating the electron resistivity to the optically measured phonon population, the data are fit using a Landauer model to determine the key scattering parameters.

Additional Information

© 2007 American Chemical Society. Received 27 July 2007. Published online 20 November 2007. Published in print 1 December 2007. This research was supported in part by DOE Award No. DE-FG02-07ER46376, the James H. Zumberge Fund, the Powell Foundation, and the National Science Foundation Graduate Research Fellowship Program.

Additional details

Created:
August 19, 2023
Modified:
October 26, 2023