Optical response of small carbon clusters

Details Optical response of small carbon clusters Optical response of small carbon clusters

1996-11-29

arxiv.org/abs/physics/9612001v4

Physics

Chemical Physics

19 pages, Latex(Revtex), and 7 figures Postscript; to be published in Zeit. Phys. D; contact is bertsch@phys.washington.edu

Scientific paper

10.1007/s004600050357

We apply the time-dependent local density approximation (TDLDA) to calculate dipole excitations in small carbon clusters. A strong low-frequency mode is found which agrees well with observation for clusters C_n with n in the range 7-15. The size dependence of the mode may be understood simply as the classical resonance of electrons in a conducting needle. For a ring geometry, the lowest collective mode occurs at about twice the frequency of the collective mode in the linear chain, and this may also be understood in simple terms.

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