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Orbital and spin Hall effect in altermagnetic RuO2

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If you have a question about this talk, please contact Bo Peng.

In the past years RuO2 has emerged as a central material for understanding the basic properties of altermagnetic materials1. In our work, we study the effects of Rh-doping on the properties of altermagnetic RuO2. We use first-principles methods to simulate the effect of replacing Ru atoms with Rh and study the corresponding changes in the characteristic spin-splitting with the Bloch vector and changes in the spin-resolved Fermi surface topology. We demonstrate that the latter has a profound impact on various transport characteristics of RuO22. We thus promote Rh-doped RuO2 as a promising platform for tuning the electronic properties and transport effects in altermagnetic materials.

[1] Smejkal et al., Physical Review X 12(2022): 040501.
[2] Zhou et al., Physical Review Letters 132.5 (2024): 056701.

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