Screening of excitons in single, suspended carbon nanotubes.
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.
Walsh
Andrew G
AG
Department of Physics, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts, USA.
Vamivakas
A Nickolas
AN
Yin
Yan
Y
Cronin
Stephen B
SB
Unlü
M Selim
MS
Goldberg
Bennett B
BB
Swan
Anna K
AK
D003198:Computer Simulation; D004735:Energy Transfer; D008956:Models, Chemical; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D013059:Spectrum Analysis, Raman
D037742:Nanotubes, Carbon