Bulk sensitive x-ray absorption spectroscopy free of self-absorption effects - Condensed Matter > Strongly Correlated ElectronsReport as inadecuate




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Abstract: We demonstrate a new method of x-ray absorption spectroscopy XAS that isbulk sensitive, like traditional fluorescence yield measurements, but is notaffected by self-absorption or saturation effects. This measure of XAS isachieved by scanning the incident photon energy through an absorption edge andusing an energy sensitive photon detector to measure the partial fluorescenceyield PFY. The x-ray emission from any element or core-hole excitation thatis not resonant with the absorption edge under investigation is selected fromthe PFY. It is found that the inverse of this PFY spectrum, which we terminverse partial fluorescence yield IPFY, is linearly proportional to thex-ray absorption cross-section without any corrections due to saturation orself-absorption effects. We demonstrate this technique on the Cu L and Nd Mabsorption edges of the high-Tc cuprate LNSCO by measuring the O K PFY andcomparing the total electron yield, total fluorescence yield and IPFY spectra.



Author: A. J. Achkar, T. Z. Regier, H. Wadati, Y.-J. Kim, H. Zhang, D. G. Hawthorn

Source: https://arxiv.org/







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