The altermagnet candidate RuO2 has sparked recent debate in the scientific community regarding its magnetic ground state and the existence of a crystal Hall effect. Here, the authors synthesize high-quality RuO2 crystals and provide comprehensive measurements to reveal that its magneto-transport properties obey scaling law and align with a non-magnetic semimetal model, challenging the notion of RuO2 as an altermagnet and refining our understanding of its electronic structure.
- Xin Peng
- Zhihao Liu
- Minghu Fang