title: Time-resolved photoimaging of image-potential states in carbon nanotubes.
abstract: The first experimental evidence for the existence of image-potential states in carbon nanotubes is presented. The observed features constitute a new class of surface image states due to their quantized centrifugal motion. Measurements of binding energies and the temporal evolution of image state electrons were performed using femtosecond time-resolved photoemission. The associated lifetimes are found to be significantly longer than those of n=1 image state on graphite, indicating a substantial difference in electron decay dynamics between tubular and planar graphene sheets.
authors.affiliation: James R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506-2604, USA.
authors.forename: M
authors.initials: M
authors.lastname: Zamkov
authors.forename: N
authors.initials: N
authors.lastname: Woody
authors.forename: B
authors.initials: B
authors.lastname: Shan
authors.forename: S
authors.initials: S
authors.lastname: Bing
authors.forename: H S
authors.initials: HS
authors.lastname: Chakraborty
authors.forename: Z
authors.initials: Z
authors.lastname: Chang
authors.forename: U
authors.initials: U
authors.lastname: Thumm
authors.forename: P
authors.initials: P
authors.lastname: Richard