Magneto-transport properties of proposed triply degenerate topological semimetal Pd${}_3$Bi${}_2$S${}_2$

Abstract

We report transport properties of single-crystalline Pd${}_3$Bi${}_2$S${}_2$, which has been predicted to host an unconventional electronic phase of matter beyond three-dimensional Dirac and Weyl semimetals. Similar to several topological systems, the resistivity shows field induced metal-semiconductor-like crossover at low temperature. Large, anisotropic and non-saturating magnetoresistance (MR) has been observed in transverse experimental configuration. At 2 K and 9 T, the MR value reaches as high as $\sim$1.1$\times$10${}^3$ \%. Hall resistivity reveals the presence of two types of charge carriers and has been analyzed using two-band model. In spite of the large density ($>$ 10${}^{21}$ cm${}^{-3}$), the mobility of charge carriers is found to be quite high ($\sim$ 0.75$\times$10${}^4$ cm${}^2$ V${}^{-1}$ s${}^{-1}$ for hole and $\sim$ 0.3$\times$10${}^4$ cm${}^2$ V${}^{-1}$ s${}^{-1}$ for electron). The observed magneto-electrical properties indicate that Pd${}_3$Bi${}_2$S${}_2$ may be a new member of the topological semimetal family, which can have a significant impact in technological applications.

Five pages and five figures

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Cited by in corpus (2)

• Signature of topological non-trivial band structure in Ta${}_3$SiTe${}_6$
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