Angular Magnetoresistance and Hall Measurements in New Dirac Material, ZrSiS

Dirac and Weyl materials have shot to the forefront of condensed matter research in the last few years. Recently, the square-net material, ZrSiS, was theorized and experimentally shown (via ARPES) to host several highly dispersive Dirac cones, including the first Dirac cone demanded by non-symmorphic symmetry in a Si square net. Here we report the magnetoresistance and Hall Effect measurements in this compound. ZrSiS samples with RRR $=$ 40 were found to have MR values up to 6000{\%} at 2 K, be predominantly p-type with a carrier concentration of \textasciitilde 8 x 10$^{\mathrm{19}}$ cm$^{\mathrm{-3}}$ and mobility \textasciitilde 8500 cm$^{\mathrm{2}}$/Vs. Angular magnetoresistance measurements reveal a peculiar behavior with multiple local maxima, depending on field strength, indicating of a sensitive and sensitive Fermi surface. SdH oscillations analysis confirms Hall and angular magnetoresistance measurements. These results, in the context of the theoretical and ARPES results, will be discussed.