Effects of electronic correlation on X-Ray absorption and dichroic spectra at L$_{2,3}$ edge

Details Effects of electronic correlation on X-Ray absorption and dichroic spectra at L$_{2,3}$ edge Effects of electronic correlation on X-Ray absorption and dichroic spectra at L$_{2,3}$ edge

2010-10-21

arxiv.org/abs/1010.4397v1

Physics

Condensed Matter

Materials Science

3 figures, 5 pages, submitted to Phys. Rev. B

Scientific paper

We present a new theoretical approach to describe X-Ray absorption and Magnetic Circular Dichroism spectra in the presence of e-e correlation. Our approach provides an unified picture to include correlations in both charged and neutral excitations, namely in direct / inversion photoemission where electrons are removed/added, and photo absorption where electrons are promoted from core levels to empty states. We apply this approach to the prototypical case of L$_{2,3}$ edge of 3$d$ transition metals and we show that the inclusion of many body effects in the core level excitations is essential to reproduce, together with satellite structures in core level photoemission, the observed asymmetric line shapes in X-ray absorption and dichroic spectra.

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