Towards spectral pattern of spin polarized sodium clusters: The example of Na12
Institut für Theoretische Physik, Universität Erlangen, Staudtstrasse 7, 91058
2 Laboratoire de Physique Quantique, Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse Cedex, France
Accepted: 29 July 1998
Published online: 15 February 1999
We investigate spin modes in the ground state and the polarized first isomer of the Na12 cluster describing the valence electrons in time-dependent local-spin-density approximation (TDLSDA) and the detailed ionic background using local pseudopotentials. The spin modes show a collective redshift compared to the unperturbed particle-hole excitations. They are strongly fragmented and the average energy of the modes along the principal axes are related to the underlying geometry (triaxial or axially symmetric). For the polarized isomer, we find significant cross talk between the spin modes and the dipole plasmon, which hints at a possible spectroscopic identification.
PACS: 36.20.Kd – Electronic structure and spectra / 36.40.Gk – Plasma and collective effects in clusters / 36.40.Vz – Optical properties of clusters
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999