https://doi.org/10.1007/s100530070089
Static electric dipole polarizabilities of Na clusters
1
Institute for Theoretical Physics, University of Regensburg,
93040 Regensburg, Germany
2
Institute for Theoretical Physics, University of Erlangen,
91077 Erlangen, Germany
Received:
8
November
1999
Published online: 15 August 2000
The static electric dipole polarizability of 
clusters
with even N has been calculated in a collective, axially averaged
and a three-dimensional, finite-field approach for 
,
including the ionic structure of the clusters. The validity of a
collective model for the static response of small systems is
demonstrated. Our density functional calculations verify the trends
and fine structure seen in a recent experiment. A pseudopotential
that reproduces the experimental bulk bond length and atomic energy
levels leads to a substantial increase in the calculated
polarizabilities, in better agreement with experiment. We relate
remaining differences in the magnitude of the theoretical and
experimental polarizabilities to the finite temperature present in
the experiments.
PACS: 36.40.-c – Atomic and molecular clusters / 31.15.Ew – Density-functional theory / 33.15.Kr – Electric and magnetic moments (and derivatives), polarizability, and magnetic susceptibility
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000
