We present a new theoretical approach to describe x-ray absorption and magnetic circular dichroism spectra in the presence of electron-electron 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 photoabsorption where electrons are promoted from core levels to empty states. We apply this approach to the prototypical case of the L-2,(3) edge of 3d 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 lineshapes in x-ray absorption and dichroic spectra.

Effects of electronic correlation on x-ray absorption and dichroic spectra at L-2,(3) edge / L., Pardini; V., Bellini; MANGHI, Franca. - In: JOURNAL OF PHYSICS. CONDENSED MATTER. - ISSN 0953-8984. - STAMPA. - 23:(2011), pp. 215601-215607. [10.1088/0953-8984/23/21/215601]

Effects of electronic correlation on x-ray absorption and dichroic spectra at L-2,(3) edge

MANGHI, Franca
2011

Abstract

We present a new theoretical approach to describe x-ray absorption and magnetic circular dichroism spectra in the presence of electron-electron 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 photoabsorption where electrons are promoted from core levels to empty states. We apply this approach to the prototypical case of the L-2,(3) edge of 3d 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 lineshapes in x-ray absorption and dichroic spectra.
2011
23
215601
215607
Effects of electronic correlation on x-ray absorption and dichroic spectra at L-2,(3) edge / L., Pardini; V., Bellini; MANGHI, Franca. - In: JOURNAL OF PHYSICS. CONDENSED MATTER. - ISSN 0953-8984. - STAMPA. - 23:(2011), pp. 215601-215607. [10.1088/0953-8984/23/21/215601]
L., Pardini; V., Bellini; MANGHI, Franca
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/655436
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