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 (μ₀H) having a non-zero component along the electrical current, we find a large, positive, and linear in μ₀H 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 or conventional magnetoresistivity (CMR for electric fields E⊥μ₀H) is large and positive, increasing by 10³−10⁴ % as a function of μ₀H while following an anomalous, angle-dependent power law \({\rho }_{{{{\rm{xx}}}}}\propto {({\mu }_{0}H)}^{n}\) with n(θ) ≤ 1. The order of magnitude of the CMR, and its anomalous power-law, is explained in terms of uncompensated electron and hole-like Fermi surfaces characterized by anisotropic carrier scattering likely due to the lack of Lorentz invariance.

_{我们报告了 Pd 3} In ₇的输运研究，其电子色散中显示了多个狄拉克 II 型节点。Pd ₃ In ₇具有低残余电阻率和高迁移率的特点，这与类狄拉克准粒子一致。对于沿电流具有非零分量的外加磁场 ( μ ₀ H )，我们发现μ ₀ H纵向磁阻 (LMR) 较大、正且呈线性。LMR 的符号及其线性相关性偏离了外尔半金属中手征异常驱动的 LMR 的行为。有趣的是，这种异常的 LMR 与 II 型韦尔半金属中异常作用的预测是一致的。相比之下，横向或传统磁阻（电场E ⊥ μ ₀ H的 CMR ）较大且为正值，作为μ ₀ H的函数增加 10 ³ -10 ⁴ % ，同时遵循反常、角度相关的幂律\ ({\rho }_{{{{\rm{xx}}}}}\propto {({\mu }_{0}H)}^{n}\) 且 n ( θ ) ≤ 1。 CMR 的大小及其反常幂律可以用未补偿的电子和类空穴费米表面来解释，其特征是各向异性载流子散射，可能是由于缺乏洛伦兹不变性。