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X-ray Magnetic Circular Dichroism in RuO$_2$

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arxiv 2312.02629 v2 pith:KE57D5NI submitted 2023-12-05 cond-mat.str-el cond-mat.mtrl-sci

A. Hariki , Y. Takahashi , J. Kuneš This is my paper · ORCID
classification cond-mat.str-elcond-mat.mtrl-sci
keywords circulardichroisminteractionmagneticspectravectorx-rayxmcd
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abstract

We present numerical simulation of the X-ray magnetic circular dichroism (XMCD) of the $L_{2,3}$ and $M_{2,3}$ edges of Ru in antiferromagnetic RuO$_2$ using a combination of density functional + dynamical mean-field theory and configuration interaction treatment of Anderson impurity model. We study the dependence of the dichroic spectra on the orientation of the N\'eel vector and discuss it in the context of altermagnetism. Approximate equivalence between the XMCD spectra for geometries with X-rays propagating parallel and perpendicular to the N\'eel vector is found and shown to be exact in absence of valence spin-orbit coupling and core-valence multipolar interaction.

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Cited by 1 Pith paper

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  1. Symmetry-Breaking Magneto-Optical Effects in Altermagnets

    cond-mat.mtrl-sci 2025-05 conditional novelty 6.0 of 10

    Uniaxial strain selectively breaks the symmetries that hide altermagnetism, producing detectable optical absorption and Kerr rotation that ordinary antiferromagnets do not show.

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