Fermi surface studies of type-II Dirac semimetal ZrTe₂using torque magnetometry

The transition metal dichalcogenides (AX₂, A = Mo, W, Ta, Zr, Hf, etc., and X = S, Se, or Te) are interesting as they provide platforms for exploring rich and tunable physical properties such as charge density wave, superconductivity, non-trivial band topology, etc. Here, we have explored the Fermi surface of ZrTe₂ using torque magnetometry with applied fields up to 35 T and temperatures down to 0.32 K. Our torque data show de Haas-van Alphen (dHvA) oscillations with two distinct frequencies at 88 T and 530 T. The angular and temperature dependence of the oscillations was performed to understand the Fermi surface properties. Also, the density functional theory calculations were carried out to explain our experimental results. We found that the angular dependence of the observed frequencies agrees with our first-principles calculations.