The microscopic structure of the photo-excited plasmon excitation in C-60 and C-70 is investigated using linear response theory. One finds that Landau damping provides the main contribution to the lineshape and the linewidth of the Mie-type plasmon being able, in the case of C-70, to mask the deformation splitting effect associated with the low equilibrium symmetry (D-5h) of this fullerene. Furthermore, it is found that the coupling of the plasmon to the normal modes of vibration of the fullerenes provides a sizeable contribution to the lineshape, without significantly affecting the linewidth. This coupling is found to be active already at T = 0, exhibiting a weak temperature dependence.

Microscopic structure of collective density oscillations C60 and C70 / M. Hansen, J. Pacheco, G. Onida. - In: ZEITSCHRIFT FÜR PHYSIK. D, ATOMS, MOLECULES AND CLUSTERS. - ISSN 0178-7683. - 35:2(1995), pp. 141-148.

Microscopic structure of collective density oscillations C60 and C70

G. Onida
Ultimo
1995

Abstract

The microscopic structure of the photo-excited plasmon excitation in C-60 and C-70 is investigated using linear response theory. One finds that Landau damping provides the main contribution to the lineshape and the linewidth of the Mie-type plasmon being able, in the case of C-70, to mask the deformation splitting effect associated with the low equilibrium symmetry (D-5h) of this fullerene. Furthermore, it is found that the coupling of the plasmon to the normal modes of vibration of the fullerenes provides a sizeable contribution to the lineshape, without significantly affecting the linewidth. This coupling is found to be active already at T = 0, exhibiting a weak temperature dependence.
surface fluctuations; vibrational-spectrum; nuclear-excitations; clusters; microclusters; fullerenes; resonances; C60
Settore FIS/03 - Fisica della Materia
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/184652
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