We present an ab initio calculation of the line shape of the photoabsorption spectrum of Na-8 and Nag clusters at zero temperature, including the polarization effect driven by the electron-plasmon coupling, together with the electron-phonon coupling. The electron-plasmon coupling is found to yield a significant lowering of the energy centroid of the plasmons, whereas the main effect the electron-phonon coupling has is to smooth the spectrum.
The role of quantal fluctuations in the optical response of small metal clusters / A. Fortini, M. Mazzola, A. Mina, D. Provasi, G. Colo', G. Onida, H.E. Roman, R.A. Broglia. - In: JOURNAL OF PHYSICS. B, ATOMIC MOLECULAR AND OPTICAL PHYSICS. - ISSN 0953-4075. - 38:11(2005), pp. 1581-1589. [10.1088/0953-4075/38/11/001]
The role of quantal fluctuations in the optical response of small metal clusters
A. Fortini
Primo
;D. Provasi;G. Colo';G. Onida;H.E. RomanPenultimo
;R.A. BrogliaUltimo
2005
Abstract
We present an ab initio calculation of the line shape of the photoabsorption spectrum of Na-8 and Nag clusters at zero temperature, including the polarization effect driven by the electron-plasmon coupling, together with the electron-phonon coupling. The electron-plasmon coupling is found to yield a significant lowering of the energy centroid of the plasmons, whereas the main effect the electron-phonon coupling has is to smooth the spectrum.File | Dimensione | Formato | |
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