TY - JOUR
KW - paper
AU - C. Kramberger
AU - R. Hambach
AU - Christine Giorgetti
AU - M. Ruemmeli
AU - M. Knupfer
AU - J. Fink
AU - B. Buechner
AU - Lucia Reining
AU - E. Einarsson
AU - S. Maruyama
AU - Francesco Sottile
AU - K. Hannewald
AU - Olevano V
AU - A-G Marinopoulos
AU - T. Pichler
AB - We have measured a strictly linear pi plasmon dispersion along the axis of individualized single-wall carbon nanotubes, which is completely different from plasmon dispersions of graphite or bundled single-wall carbon nanotubes. Comparative ab initio studies on graphene-based systems allow us to reproduce the different dispersions. This suggests that individualized nanotubes provide viable experimental access to collective electronic excitations of graphene, and it validates the use of graphene to understand electronic excitations of carbon nanotubes. In particular, the calculations reveal that local field effects cause a mixing of electronic transitions, including the \"Dirac cone\" resulting in the observed linear dispersion.
BT - Phys. Rev. Lett.
CY - ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
DO - 10.1103/PhysRevLett.100.196803
M1 - 19
N2 - We have measured a strictly linear pi plasmon dispersion along the axis of individualized single-wall carbon nanotubes, which is completely different from plasmon dispersions of graphite or bundled single-wall carbon nanotubes. Comparative ab initio studies on graphene-based systems allow us to reproduce the different dispersions. This suggests that individualized nanotubes provide viable experimental access to collective electronic excitations of graphene, and it validates the use of graphene to understand electronic excitations of carbon nanotubes. In particular, the calculations reveal that local field effects cause a mixing of electronic transitions, including the \"Dirac cone\" resulting in the observed linear dispersion.
PB - AMER PHYSICAL SOC
PP - ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
PY - 2008
T2 - Phys. Rev. Lett.
TI - Linear plasmon dispersion in single-wall carbon nanotubes and the collective excitation spectrum of graphene
UR - http://dx.doi.org/10.1103/PhysRevLett.100.196803
VL - 100
ER -