1992/01/01 by Ralf Hambach, R. Hambach, Christine Giorgetti +11 · 6 citations
Arts and Humanities · Materials Science · Physics and Astronomy · Psychology · #Advanced Chemical Physics Studies #Angular momentum #Atomic and Molecular Physics #Atomic physics #Bragg's law #Brillouin zone #Condensed matter physics #Coupling (piping) #Dynamic structure factor #Epistemology #Graphene research and applications #Graphite #Inelastic neutron scattering #Inelastic scattering #Materials science #Momentum (technical analysis) #Nietzsche, Schopenhauer, and Hegel #Optics #Phase (matter) #Phenomenology and Existential Philosophy #Philosophy #Philosophy and Historical Thought #Physics #Quantum mechanics #Random phase approximation #Scattering #Spectral line #Structure factor #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevlett.101.266406
published in Dialnet (Universidad de la Rioja) 101(26), 266406 (Universidad Internacional de La Rioja)
openalex publication_date 1992/01/01 · arxiv created 2010/04/29 · arxiv updated 2010/04/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/04/28
The electron energy-loss function of graphite is studied for momentum transfers q beyond the first Brillouin zone. We find that near Bragg reflections the spectra can change drastically for very small variations in q. The effect is investigated by means of first principle calculations in the random phase approximation and confirmed by inelastic x-ray scattering measurements of the dynamic structure factor S(q, omega). We demonstrate that this effect is governed by crystal local field effects and the stacking of graphite. It is traced back to a strong coupling between excitations at small and large momentum transfers.