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Phys. Rev. Lett. 94, 065503 (2005) [4 pages]

Photoexcitation of a Volume Plasmon in C60 Ions

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S. W. J. Scully*, E. D. Emmons, M. F. Gharaibeh, and R. A. Phaneuf
Department of Physics, MS 220, University of Nevada, Reno, Nevada 89557-0058, USA

A. L. D. Kilcoyne and A. S. Schlachter
Advanced Light Source, Lawrence Berkeley National Laboratory, MS 7-100, Berkeley, California 94720, USA

S. Schippers and A. Müller
Institut für Atom- und Molekülphysik, Justus-Liebig-Universität, 35392 Giessen, Germany

H. S. Chakraborty†, M. E. Madjet‡, and J. M. Rost
Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany

Received 19 May 2004; published 17 February 2005

Neutral C60 is well known to exhibit a giant resonance in its photon absorption spectrum near 20 eV. This is associated with a surface plasmon, where delocalized electrons oscillate as a whole relative to the ionic cage. Absolute photoionization cross-section measurements for C60+, C602+, and C603+ ions in the 17–75 eV energy range show an additional resonance near 40 eV. Time-dependent density functional calculations confirm the collective nature of this feature, which is characterized as a dipole-excited volume plasmon made possible by the special fullerene geometry.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.065503
DOI:
10.1103/PhysRevLett.94.065503
PACS:
61.48.+c, 33.20.Ni, 36.40.Gk, 79.60.Fr

*Present address: Department of Pure and Applied Physics, Queen's University, Belfast BT7 1NN, United Kingdom.

†Present address: James R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS 66506-2604, USA.

‡Present address: Freie Universität Berlin, Institut für Chemie (Kristallographie), Takustrasse 6, D-14195 Berlin, Germany.

See Also

Comment: A. V. Korol and A. V. Solov’yov, Comment on “Photoexcitation of a Volume Plasmon in C60 Ions”, Phys. Rev. Lett. 98, 179601 (2007).

Reply: S. W. Scully, E. D. Emmons, M. F. Gharaibeh, R. A. Phaneuf, A. L. Kilcoyne, A. S. Schlachter, S. Schippers, A. Müller, H. S. Chakraborty, M. E. Madjet, and J. M. Rost, Scully et al. Reply:, Phys. Rev. Lett. 98, 179602 (2007).

 
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