Fig. 1: Electronic and magnetic properties of PdCrO₂ single crystal.

a The crystal structure of PdCrO₂. The blue, red, and white spheres represent Pd, Cr, and O atoms, respectively. The noncollinear and noncoplanar spin structure of PdCrO₂ below T_N is shown along q = (1/3, 1/3, 0) (yellow planes). b Cross section of the quasi-2D hexagonal Fermi surface (FS) above T_N. Significant quasiparticle scattering through a magnetic q-vector produces hot spots at the corners of the hexagonal FS (red-shaded areas). c Schematic illustration of the spin-cluster skew scattering. Asymmetric scattering arises from interference between the scattering processes (the dashed lines) with the localized spins (the red arrow) and conduction spins of electrons (the blue arrows). d False-color SEM images of FIB-fabricated PdCrO₂ single crystals carved in typical Hall bar-type patterns (purple) with gold electrodes (yellow). e Temperature-dependent in-plane resistivity of PdCrO₂ showing a clear anomaly at T_N = 37.5 K. f, g Temperature-dependent torque magnetometry signal τ/H of up to 30 T in the antiferromagnetic phase (f) and the paramagnetic phase (g). The optical image of a single crystal mounted on a piezoresistive cantilever and the observed magnetic quantum oscillations at low temperatures are shown in the insets of (f). Above T_N, a clear deviation from the ideal paramagnetic behavior τ/H ~ H (dashed straight line) is observed in g and the insets of g.