Publication
We show the experimental and calculated q-dependent low energy loss electron energy loss spectrum of Ru and Ag. The spectra were calculated within the time-dependent density-functional theory including local-field effects. For Ag, the momentum transfer was parallel to the (1 1 0) direction. For Ru the three main directions (0 1 0), (1 1 0) and (0 0 1) were investigated. The agreement between theory and experiment is very good for Ag and for momentum transfers parallel to the (0 0 1) direction of Ru. For momentum transfers parallel to the in-plane directions (1 1 0) and (0 1 0) the agreement for Ru is not satisfactory, which could be attributed to relativistic effects or to strong localization of the 4d states of Ru.
Romain Christophe Rémy Fleury, Matthieu Francis Malléjac, Bakhtiyar Orazbayev, Stefan Rotter