Universal Scaling Behavior of Transport Properties in Non-Magnetic RuO${}_2$

Abstract

As a prototypical altermagnet, RuO${}_2$ has been subject to many controversial reports regarding its magnetic ground state and the existence of crystal Hall effects. We obtained high-quality RuO${}_2$ single crystal with a residual resistivity ratio (RRR = 152), and carefully measured its magnetization, longitudinal resistivity (${\rho }_{xx}$) and Hall resistivity (${\rho }_{yx}$) up to 35 T magnetic field. We also calculated its electronic band, Fermi surface, and conducted numerical simulations for its transport properties. It was found that no magnetic transition occurs below 400 K, and that all the transport properties are consistent with the numerical simulations results, indicating that the magnetotransport properties originate from the intrinsic electronic structures and are dominated by the Lorentz force. Particularly, no crystal Hall effects were observed in our RuO${}_2$ samples and both magnetoresistance and Hall resistivity follow scaling behavior. These results demonstrate that RuO${}_2$ is a typical semimetal, rather than an altermagnet.

5 pages, 4 figures

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Cited by in corpus (7)

• Exploration of Altermagnetism in $\mathrm{Ru}{\mathrm{O}}_2$
• Surface-Localized Magnetic Order in RuO2 Thin Films Revealed by Low-Energy Muon Probes
• Non-Altermagnetic Origin of Exchange Bias Behaviors in Incoherent RuO${}_2$/Fe Bilayer Heterostructures
• Pressure-Induced Metal-Insulator and Paramagnet-Altermagnet Transitions in Rutile OsO2 Single Crystals
• Topological nontrivial berry phase in altermagnet CrSb
• T-square electric resistivity and its thermal counterpart in RuO${}_2$
• Moiré-resonant surface state in ultrathin RuO${}_2$