Single Crystals*

Transition-metal dipnictide PdSb₂ is a candidate for hosting 6-fold-degenerate exotic fermions (beyond Dirac and Weyl fermions) with degeneracy stabilized by the non-symmorphic symmetry. Such symmetry plays crucial role in electrical transport properties. We have for the first time grown single crystals of PdSb₂ and characterized its physical properties. X-ray diffraction measurement shows that PdSb₂ forms the Pyrite-type cubic structure (space group 205) at room temperature. Electrical resistivity displays metallic behavior with T² dependence at low temperatures, indicating the Fermi-liquid ground state. The Hall coefficient is positive and decreases with increasing temperature, consistent with the multiband nature in the electronic structure. However, the transverse magnetoresistance is found to obey the Kohler’s law at all temperatures, indicating only one type (hole-type) of charge carrier dominates the electrical transport. Furthermore, we find appreciable electronic contribution on both thermal conductivity and specific heat of PdSb₂. The implication will be discussed based on both experimental observation and theoretical calculations.