Time-resolved photoimaging of image-potential states in carbon nanotubes.
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.
Zamkov
M
M
James R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506-2604, USA.
Woody
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N
Shan
B
B
Bing
S
S
Chakraborty
H S
HS
Chang
Z
Z
Thumm
U
U
Richard
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P