Transport properties of the Dirac type-II semi-metal candidate PtTe$_2$

We investigated the electronic structure and transport properties via the temperature and angular dependence of the Shubnikov-de Haas (SdH) and de Haas van Alphen (dHvA) effect in single crystals of the semi-metallic platinum ditelluride (PtTe$_2$), recently claimed to be a novel type-II Dirac semimetal. Our high-quality PtTe$_2$ crystal displays non-saturating and large magnetoresistance at magnetic field up to 9 T. The dHvA oscillation reveals up to 8 frequencies suggesting a rather complex Fermi surface with evidence for a non-trivial Berry phase. The crystal quality improved considerably under subsequent annealing at high-temperatures leading to the observation of linear in field magnetoresistivity. Combined with effective masses in the order of $\sim 0.1$ free electron mass, these results further suggest that PtTe$_2$ displays bulk Dirac-like bands. Hall-effect measurements suggest that this compound is not a compensated semi-metal.