Temperature Dependence of the Optical Response of Small Sodium Clusters
chem-ph
2009-10-28 v1 Chemical Physics
Abstract
We present an analysis of the temperature dependence of the optical response of small sodium clusters in a temperature range bracketing the melting phase transition. When the temperature increases, the mean excitation energy undergoes a red shift and the plasmon is significantly broadened, in agreement with recent experimental data. We show that the single--particle levels acquire a prominent width and the HOMO--LUMO gap as well as the width of the occupied band are reduced due to large thermal cluster size and shape fluctuations. This results in a sharp increase of the static polarizability with temperature.
Cite
@article{arxiv.chem-ph/9504001,
title = {Temperature Dependence of the Optical Response of Small Sodium Clusters},
author = {Aurel Bulgac and Caio Lewenkopf},
journal= {arXiv preprint arXiv:chem-ph/9504001},
year = {2009}
}
Comments
9 pages, Revtex, 3 uuencoded postscript figures