TY  - JOUR
AU  - Sternemann, C.
AU  - Huotari, S.
AU  - Vanko, G.
AU  - Volmer, M.
AU  - Monaco, G.
AU  - Gusarov, A.
AU  - Lustfeld, H.
AU  - Sturm, K.
AU  - Schuelke, W.
TI  - Correlation-Induced Double-Plasmon Excitation in Simple Metals Studied by Inelastic X-Ray Scattering
JO  - Physical review letters
VL  - 95
SN  - 0031-9007
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-49088
SP  - 157401
PY  - 2005
N1  - Record converted from VDB: 12.11.2012
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000232443400059
DO  - DOI:10.1103/PhysRevLett.95.157401
UR  - https://juser.fz-juelich.de/record/49088
ER  -