title: Screening of excitons in single, suspended carbon nanotubes.
abstract: Resonant Raman spectroscopy of single carbon nanotubes suspended across trenches displays red-shifts of up to 30 meV of the electronic transition energies as a function of the surrounding dielectric environment. We develop a simple scaling relationship between the exciton binding energy and the external dielectric function and thus quantify the effect of screening. Our results imply that the underlying particle interaction energies change by hundreds of meV.
authors.affiliation: Department of Physics, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts, USA.
authors.forename: Andrew G
authors.initials: AG
authors.lastname: Walsh
authors.forename: A Nickolas
authors.initials: AN
authors.lastname: Vamivakas
authors.forename: Yan
authors.initials: Y
authors.lastname: Yin
authors.forename: Stephen B
authors.initials: SB
authors.lastname: Cronin
authors.forename: M Selim
authors.initials: MS
authors.lastname: Unlü
authors.forename: Bennett B
authors.initials: BB
authors.lastname: Goldberg
authors.forename: Anna K
authors.initials: AK
authors.lastname: Swan
mesh_terms: D003198:Computer Simulation; D004735:Energy Transfer; D008956:Models, Chemical; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D013059:Spectrum Analysis, Raman
chemical_list: D037742:Nanotubes, Carbon