Apr 24, 2024
2:15pm - 2:30pm
Room 448, Level 4, Summit
Luis Balicas1,2,Aikaterini Flessa Savvidou1,2,Andrzej Ptok3,Gargee Sharma3,Brian Casas2,Judith Clark4,Victoria Li4,Michael Shatruk1,Sumanta Tewari5
Florida State Univ1,National High Magnetic Field Lab2,Institute of Nuclear Physics3,Department of Chemistry and Biochemistry4,Clemson University5
Luis Balicas1,2,Aikaterini Flessa Savvidou1,2,Andrzej Ptok3,Gargee Sharma3,Brian Casas2,Judith Clark4,Victoria Li4,Michael Shatruk1,Sumanta Tewari5
Florida State Univ1,National High Magnetic Field Lab2,Institute of Nuclear Physics3,Department of Chemistry and Biochemistry4,Clemson University5
We report a transport study on Pd<sub>3</sub>In<sub>7</sub> which displays multiple Dirac type-II nodes in its electronic dispersion. Pd<sub>3</sub>In<sub>7</sub> is characterized by<br/>low residual resistivities and high mobilities, which are consistent with Dirac-like quasiparticles. For an applied magnetic field (<i>μ</i><sub>0</sub><i>H</i>) having a non-zero component along the electrical current, we find a large, positive, and linear in <i>μ</i><sub>0</sub><i>H</i> longitudinal magnetoresistivity (LMR). The<br/>sign of the LMR and its linear dependence deviate from the behavior reported for the chiral-anomaly-driven LMR in Weyl semimetals.<br/>Interestingly, such anomalous LMR is consistent with predictions for the role of the anomaly in type-II Weyl semimetals. In contrast, the<br/>transverse or conventional magnetoresistivity (CMR for electric fields <i>E </i>⊥ <i>μ</i><sub>0</sub><i>H</i>) is large and positive, increasing by 10<sup>3</sup> − 10<sup>4</sup> % as a function<br/>of <i>μ</i><sub>0</sub><i>H</i> while following an anomalous, angle-dependent power law <i>ρ</i><sub>xx</sub> ∝ (<i>μ</i><sub>0</sub><i>H</i>)<sup>n</sup> with <i>n</i>(<i>θ</i>) ≤ 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.