%0 Journal Article
%A Sternemann, C.
%A Huotari, S.
%A Vanko, G.
%A Volmer, M.
%A Monaco, G.
%A Gusarov, A.
%A Lustfeld, H.
%A Sturm, K.
%A Schuelke, W.
%T Correlation-Induced Double-Plasmon Excitation in Simple Metals Studied by Inelastic X-Ray Scattering
%J Physical review letters
%V 95
%@ 0031-9007
%C College Park, Md.
%I APS
%M PreJuSER-49088
%P 157401
%D 2005
%Z Record converted from VDB: 12.11.2012
%X We report a new type of peaklike structure observed in the tail of the dynamic structure factor of simple metals, measured by inelastic x-ray scattering. Based on the momentum-transfer dependence of the energy position and the intensity of this structure, it has been unambiguously attributed to intrinsic plasmon-plasmon excitations, an electronic correlation effect that was theoretically predicted by many-body perturbation theory of the homogeneous-electron-gas model beyond the random-phase approximation. This signature appears to be largely unaffected by electron-ion interaction effects. Thus a structure that is primarily caused by correlation effects in the electron gas has been found experimentally in the dynamic structure factor of simple metals.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000232443400059
%R 10.1103/PhysRevLett.95.157401
%U https://juser.fz-juelich.de/record/49088