Momentum Dependence of Fluorine K-Edge Core Exciton in LiF
K Hamalainen, S Galambosi, J A. Soininen, Eric L. Shirley, A Shukla, J P. Rueff
Non-resonant inelastic x-ray scattering spectra have been measured with an energy loss close to the fluorine K-edge of lithium fluoride. The extracted dynamic structure factor is well reproduced by an ab initio computational scheme that takes the electron-hole interaction into account. A systematic study of the momentum-transfer dependence with high energy resolution in the close vicinity of the K-edge shows clear deviations from the dipole approximation. With the help of the calculations, it is shown that the observed deviations are becuase of an s-type exciton.
Physical Review B (Condensed Matter and Materials Physics)
, Galambosi, S.
, Soininen, J.
, Shirley, E.
, Shukla, A.
and Rueff, J.
Momentum Dependence of Fluorine K-Edge Core Exciton in LiF, Physical Review B (Condensed Matter and Materials Physics)
(Accessed June 6, 2023)