Eur. Phys. J. D (2015) 69: 141
https://doi.org/10.1140/epjd/e2015-60017-8

Regular Article

On the response function of simple metal clusters

¹ Institut für Theoretische Physik, Johannes Kepler Universität, A 4040 Linz, Austria
² Physics Department, University at Buffalo, The State University New York, Buffalo, NY 14260, USA
³ Laboratoire de Physique Théorique, Université de Toulouse, CNRS-UMR5152, 31062 Toulouse Cedex, France

^a e-mail: suraud@irsamc.ups-tlse.fr

Received: 9 January 2015
Received in final form: 10 April 2015
Published online: 2 June 2015

Abstract

We analyse the response function of simple metal clusters considering several theoretical approaches and exploring a large class of momenta and energies. The study is performed on a wide range of cluster sizes to explore the relative weight of the various dominant contributions to the response. We work with Sodium clusters in jellium approximation. The comparison between the various theoretical approaches shows altogether a remarkable consistency. The simple Boson approximation to the response function is furthermore shown to perform remarkably well in spite of its simplicity.