Journal
NANO LETTERS
Volume 7, Issue 12, Pages 3618-3622Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl071840f
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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.
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