Semiclassical approach to metal cluster dynamics

Eric Giglio (1, 2) , P.G. Reinhard (3) , Eric Suraud (4)

1 SIMUL - Simulation
2 CIMAP - UMR 6252 - Centre de recherche sur les Ions, les MAtériaux et la Photonique
3 Institut für Theoretische Physik
4 LPT - Laboratoire de Physique Théorique

We show that semiclassical methods provide a valid description for the electronic and ionic dynamical response of metal clusters in the regime of high excitation energies. We consider real time dynamics for electrons at a Vlasov-LDA level and include dynamical correlations by an Ühling-Uhlenbeck collision term. Coupling to ionic motion is explicitly accounted for by means of a pseudo potential. It is found that electron-electron collisions are more important than electron-ion collisions for determining the width of the plasmon response at high excitation energies. The coupling to true ionic motion yields non-adiabatic molecular dynamics which is validated on the picosecond time scale.

Mots clés: metal clusters; semiclassic

Domaines: Physique [physics]; Matière Condensée [cond-mat]

Eric Giglio, P.G. Reinhard, Eric Suraud. Semiclassical approach to metal cluster dynamics. Journal of Physics B: Atomic, Molecular and Optical Physics, 2000, Journal of Physics B: Atomic, Molecular and Optical Physics, 33 (9), pp.333. ⟨10.1088/0953-4075/33/9/103⟩. ⟨hal-03152894⟩