Resonant inelastic soft x-ray scattering of Be chalcogenides

D. Eich, O. Fuchs, U. Groh, L. Weinhardt, R. Fink, E. Umbach, C. Heske*, A. Fleszar, W. Hanke, E. K.U. Gross, C. Bostedt, T. V. Buuren, N. Franco, L. J. Terminello, M. Keim, G. Reuscher, H. Lugauer, A. Waag

*Corresponding author for this work

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The bulk electronic band structures of BeTe and BeSe have been studied by resonant inelastic soft x-ray scattering (RIXS) at the Be 1s edge. We derive direct and indirect bulk band gaps and observe the coexistence of core excitons and momentum conservation. A quantitative analysis of the coherent spectral fraction gives insight into the femtosecond time scale of the relevant dephasing processes. Experimental results agree very well with calculations based on the Kramers-Heisenberg and density-functional theories.

Original languageAmerican English
Article number115212
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number11
StatePublished - 2006
Externally publishedYes


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