Role of multiple dipole scattering in high-resolution electron-energy-loss spectroscopy

Li Ming Luo Yu, Paul Thiry, Alain Degiovanni, Thierry Conard, Roland Caudano

    Research output: Contribution to journalArticle


    A cleaved crystal of GaSe was analyzed by high-resolution electron-energy-loss spectroscopy (HREELS) and its optical parameters were deduced by using the dielectric theory. The angular and intensity distributions of the multiple energy losses and gains of low-energy electrons scattered on GaSe(0001) were examined in detail, in order to assess the relevance of the dielectric theory for describing higher-order excitations than the first Born approximation. We find a high linear correlation between the angular shift of the successive peaks recorded on the spectrum, and we demonstrate that peak intensities are underestimated in specular measurements. Experimental as well as theoretical implications for HREELS are discussed.
    Original languageEnglish
    Pages (from-to)11613-11618
    Number of pages6
    JournalPhysical review. B, Condensed matter
    Issue number17
    Publication statusPublished - 1994


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