First-principles calculations of electron energy loss spectra for diamond were compared with experimental spectra obtained by using a scanning tunnelling electron microscope with ultra high-energy resolution for low-loss energy spectroscopy. The theoretical bulk low-loss electron energy-loss spectra, in the Eg to 10eV range, were in good agreement with experimental data. The spatially resolved spectra from dislocated regions were different from bulk spectra. The main effects were confined to energy losses lying above the band edge. The calculated spectra for low-energy dislocations were consistent with experimental observations.

Calculated and Experimental Low-Loss Electron Energy Loss Spectra of Dislocations in Diamond and GaN. R.Jones, C.J.Fall, A.Gutiérrez-Sosa, U.Bangert, M.I.Heggie, A.T.Blumenau, T.Frauenheim, P.R.Briddon: Journal of Physics - Condensed Matter, 2002, 14[48], 12793-800