The static polarisability of metal clusters and spheres in an improved Thomas-Fermi approximation
Ll Serra; F Garcias; M Barranco; J Navarro; L C Balbas; A Rubio; A Mananes; Ll Serra; Dept. de Fisica, Univ. de ses Illes Balears, Palma de Mallorca, Spain; F Garcias; Dept. de Fisica, Univ. de ses Illes Balears, Palma de Mallorca, Spain; M Barranco; Dept. de Fisica, Univ. de ses Illes Balears, Palma de Mallorca, Spain; J Navarro; Dept. de Fisica, Univ. de ses Illes Balears, Palma de Mallorca, Spain; L C Balbas; Dept. de Fisica, Univ. de ses Illes Balears, Palma de Mallorca, Spain; A Rubio; Dept. de Fisica, Univ. de ses Illes Balears, Palma de Mallorca, Spain; A Mananes; Dept. de Fisica, Univ. de ses Illes Balears, Palma de Mallorca, Spain
Журнал:
Journal of Physics: Condensed Matter
Дата:
1989-12-25
Аннотация:
The authors have used an approximate Thomas-Fermi-Dirac-Weizsacker functional to evaluate the static polarisability of clusters and spheres of metallic atoms for excitation operators of the kind r<sup>L</sup>Y<sub>L0</sub>. Calculations for Na and Ag systems made of up to N=1000 atoms have been carried out in the spherical jellium approximation for multipolarities L=1 to 15. These results have been combined with others obtained previously by the authors to estimate the width of the surface resonance and its evolution with L.
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