Fig. 1: Crystal structure, anisotropic spin/charge conductivities, and diagram of experiment.
a Rutile RuO2 unit cell with proposed antiferromagnetic spins along the c-axis, b proposed spin-split Fermi surface of d-wave altermagnetism in RuO2, c ellipsoidal conductivity tensor with the lab frame coordinates rotated relative to the crystal axes, d diagram of experimental setup for TDTS measurement with ψ being the angle between the laboratory frame (\(\hat{x}\),\(\hat{y}\),\(\hat{z}\)) and the principle crystal axis, e HRXRD θ/2θ measurement of (101) oriented sample and f in-plane ϕ scan of the asymmetric {222} planar family in both the film (red) and substrate (blue).
