Anisotropic positive linear and sub-linear magnetoresistivity in the cubic type-II Dirac metal Pd3In7

We report a transport study on Pd₃In₇ which displays multiple Dirac type-II nodes in its electronic dispersion. Pd₃In₇ is characterized by low residual resistivities and high mobilities, which are consistent with Dirac-like quasiparticles. For an applied magnetic field μ_oH having a non-zero component along the electrical current, we find a large, positive, and linear in μ_oH longitudinal magnetoresistivity (LMR). The sign of the LMR and its linear dependence deviate from the behavior reported for the chiral-anomaly-driven LMR in Weyl semimetals. Interestingly, such anomalous LMR is consistent with predictions for the role of the anomaly in type-II Weyl semimetals. In contrast, the transverse magnetoresistivity (TMR for electric fields E ⊥ μ_oH) is large and positive, increasing by 10³-10⁴ % as a function of μ_oH while following an anomalous, angle-dependent power law ρ_xx ∼ (μ_oH)^β with β(θ) ≤ 1. The order of magnitude of the TMR, and its anomalous power-law, is explained in terms of uncompensated electron and hole-like Fermi surfaces characterized by anisotropic carrier scattering likely resulting from the absence of Lorentz invariance.