Smolyanyuk, A., Smejkal, L., & Mazin, I. I. (2025). Origin of the anomalous Hall effect in Cr-doped RuO₂. Physical Review B, 111(6), Article 064406. https://doi.org/10.1103/PhysRevB.111.064406
RuO2 is one of the most highlighted candidates for altermagnetism. However, the most recent muon spin spectroscopy and neutron studies demonstrated the absence of magnetic order in this system. The electronic structure of RuO2 hints at a possibility of realizing a magnetically ordered state upon hole doping, and such a possibility was explored experimentally in Cr-doped RuO2, where it was suggested that this system exhibits the anomalous Hall effect (AHE) due to altermagnetism. In this paper, based on our density functional calculations, we revise the results obtained for this system and propose a different interpretation of experimental results. Our calculations suggest that extra holes are bound to Cr impurity and do not dope Ru bands, which remain nonmagnetic. Thus, the observed AHE is not due to the altermagnetism but stems entirely from magnetic Cr ions.
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Research facilities:
Vienna Scientific Cluster
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Project title:
Realistic simulations of correlations and disorder in materials: I 6142-N (FWF - Österr. Wissenschaftsfonds)
