Electronic states of metals and alloys investigated by high-resolution Bloch-kvector selective X-ray Raman scattering

Kaprolat, A.; Enkisch, H.; Krisch, M. H.; Schu¨lke, W.
February 2000
AIP Conference Proceedings;2000, Vol. 506 Issue 1, p327
Academic Journal
The shape of resonantly excited fluorescence spectra from valence bands of single crystal solids strongly depends on both the exact value of the excitation energy and the scattering angle, the latter determining the momentum transferred in resonant scattering experiments. This non-isotropic behavior can be explained by considering the absorption of the incident photon and the re-emission of the fluorescence photon as one single resonant inelastic scattering process which underlies a law of Bloch-kvector momentum conservation thus revealing a strong influence of the properties of the electronic band structure on the spectral shape. By measuring resonantly excited valence fluorescence emission spectra of single crystal NiAl for incident energies around the Ni 1s binding energy (8,333 eV) and comparing the obtained spectra to calculations based on the Block-kvector selectivity and a LAPW electronic band structure, we find a good agreement. © 2000 American Institute of Physics.


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