Origin of Anomalous Hall effect in Cr-doped RuO${}_2$

Abstract

RuO${}_2$ 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 RuO${}_2$ hints at a possibility of realizing a magnetically ordered state upon hole doping, and such a possibility was explored experimentally in Cr-doped RuO${}_2$, where it was suggested that this system exhibits the anomalous Hall effect (AHE) due to altermagnetism. In this manuscript, 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.

References in corpus (4)

• Itinerant Antiferromagnetism in RuO${}_2$
• Nonmagnetic Ground State in RuO${}_2$ Revealed by Muon Spin Rotation
• Stoichiometry-induced ferromagnetism in altermagnetic candidate MnTe
• Origin of Anomalous Hall effect in Cr-doped RuO${}_2$

Cited by in corpus (8)

• Spin-Polarized Antiferromagnetic Spintronics
• Tunneling Magnetoresistance Effect in Altermagnets
• Universal Scaling Behavior of Transport Properties in Non-Magnetic RuO${}_2$
• Origin of Anomalous Hall effect in Cr-doped RuO${}_2$
• Exploration of Altermagnetism in $\mathrm{Ru}{\mathrm{O}}_2$
• Altermagnetism, ARPES, symmetry, non-relativistic band splitting
• Non-Altermagnetic Origin of Exchange Bias Behaviors in Incoherent RuO${}_2$/Fe Bilayer Heterostructures
• Moiré-resonant surface state in ultrathin RuO${}_2$