Quantum oscillations in type-II Dirac semimetal PtTe2

Type-II Dirac semimetal (DSM) phase, in which Lorentz invariance is broken, has been experimentally realized in ${\mathrm{PtSe}}_{2}$ class. We study the transport properties and Fermi surface (FS) morphology of ${\mathrm{PtTe}}_{2}$ by de Haas--van Alphen (dHvA) quantum oscillations. Quantum oscillations analyses for out-of-plane and in-plane magnetizations revealed multiple frequencies with low effective mass and high quantum mobility. First-principles calculations are performed to confirm the existence of type-II Dirac fermions in ${\mathrm{PtTe}}_{2}$ and distinguish the contributing pockets for each oscillation mode. Among all the observed frequencies, one around 4510 T is identified to be derived from the electron pocket that participates in the formation of the type-II Dirac cone.