The dynamic structure factor of simple metals : a study of the electronic correlation in solids
Contributo in Atti di convegno
Data di Pubblicazione:
2010
Citazione:
The dynamic structure factor of simple metals : a study of the electronic correlation in solids / M. Cazzaniga, H.C.H. Weissker, S. Huotari, T. Pylkkanen, G. Monaco, L. Reining, G. Onida (THE SCIENCE AND CULTURE SERIES - PHYSICS). - In: Epioptics 10 : Proceedings / [a cura di] A. Cricenti. - Prima edizione. - New Jersey : World Scientific, 2010 Jun. - ISBN 9789814322393. - pp. 55-62 (( Intervento presentato al 10. convegno Epioptics: 43.Course of the International school of solid state physics tenutosi a Erice nel 2008 [10.1142/7879].
Abstract:
In this work we compare experimental inelastic X-ray scattering spectra and TDDFT results for sodium and aluminum. The effects due to the real lattice are not sufficient to bring the results significantly closer to the experimental ones than previous results for jellium. We show that an accurate description of electron correlations is also required to provide a reasonable agreement, espeaally in the case of sodium. TDDFT-TDLDA with the inclusion of lifetime effects provides a good agreement for momentum transfer vertical bar q vertical bar smaller than 2 ge, only for larger vertical bar q vertical bar the agreement deteriorates. We will discuss the possibility of constructing an exchange-correlation kernel able to reproduce these lifetime effects.
Tipologia IRIS:
03 - Contributo in volume
Keywords:
Dynamic structure factor; metals; TDDFT; IXSS
Elenco autori:
M. Cazzaniga, H.C.H. Weissker, S. Huotari, T. Pylkkanen, G. Monaco, L. Reining, G. Onida
Link alla scheda completa:
Titolo del libro:
Epioptics 10 : Proceedings