73 research outputs found
Dispersion and lineshape of plasmon satellites in one, two and three dimensions
Using state-of-the-art many-body Green's function calculations based on the
"GW plus cumulant" approach, we analyze the properties of plasmon satellites in
the electron spectral function resulting from electron-plasmon interactions in
one-, two- and three-dimensional systems. Specifically, we show how their
dispersion relation, lineshape and linewidth are related to the properties of
the constituent electrons and plasmons. To gain insight into the many-body
processes giving rise to the formation of plasmon satellites, we connect the
"GW plus cumulant" approach to a many-body wavefunction picture of
electron-plasmon interactions and introduce the coupling-strength weighted
electron-plasmon joint-density states as a powerful concept for understanding
plasmon satellites.Comment: 6 papers, 2 figure
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