title: 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.
authors.affiliation: Department of Electrical Engineering, University of Southern California, Los Angeles, CA 90089, USA.
authors.forename: Adam W
authors.initials: AW
authors.lastname: Bushmaker
authors.forename: Vikram V
authors.initials: VV
authors.lastname: Deshpande
authors.forename: Marc W
authors.initials: MW
authors.lastname: Bockrath
authors.forename: Stephen B
authors.initials: SB
authors.lastname: Cronin
mesh_terms: D004563:Electrochemistry; D004583:Electrons; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D036103:Nanotechnology; D037742:Nanotubes, Carbon / Q000737:chemistry*; D053770:Nanowires; D013059:Spectrum Analysis, Raman; D013816:Thermodynamics
chemical_list: D037742:Nanotubes, Carbon