Optical response of small closed-shell sodium clusters

Abstract

Absorption spectra of closed-shell Na_2, Na_3+, Na_4, Na_5+, Na_6, Na_7+, and Na_8 clusters are calculated using a recently implemented conserving linear response method. In the framework of a quasiparticle approach, we determine electron-hole correlations in the presence of an external field. The calculated results are in excellent agreement with experimental spectra, and some possible cluster geometries that occur in experiments are analyzed. The position and the broadening of the resonances in the spectra arise from a consistent treatment of the scattering and dephasing contributions in the linear response calculation. Comparison between the experimental and the theoretical results yields information about the cluster geometry, which is not accessible experimentally.

7 pages, 7 figures

References in corpus (8)

• Conserving GW scheme for nonequilibrium quantum transport in molecular contacts
• Fragmentation of the photoabsorption strength in neutral and charged metal microclusters
• Assessment of exchange-correlation functionals for the calculation of dynamical properties of small clusters in TDDFT
• Real-time Kadanoff-Baym approach to plasma oscillations in a correlated electron gas
• Excited-state Forces within a First-principles Green's Function Formalism
• Ionic and electronic structure of sodium clusters up to N=59
• Photoabsorption Spectra of Na_n+ clusters: Thermal Line-Broadening Mechanisms
• Conserving quasiparticle calculations for small metal clusters

Cited by in corpus (3)

• Photoabsorption in Sodium Clusters: First Principles Configuration Interaction Calculations
• Optimal control with non-adiabatic Molecular Dynamics: application to the Coulomb explosion of Sodium clusters
• Determination of electron-hole correlation length in CdSe quantum dots using explicitly correlated two-particle cumulant