Magnetic and transport properties of the topological compound DySbTe

Abstract

We report the magnetic susceptibilities $\ensuremath{\chi}(T)$, magnetization $M(H)$, transport properties $\ensuremath{\rho}(T,$ $H)$, and heat capacity ${C}_{P}(T)$ of DySbTe single crystal. DySbTe is an isostructural compound with the nonmagnetic Dirac nodal line (DNL) semimetal ZrSiS, in which Dy spins show a long-range antiferromagnetic (AFM) ordering below N\'eel temperature ${T}_{N}=7\phantom{\rule{0.16em}{0ex}}\mathrm{K}$. A steplike magnetization curve and a 1/2 magnetization plateau were observed at 2 K for a magnetic field $H$ applied parallel to the $ab$ plane. The temperature dependence of electrical resistivity of DySbTe shows a bad-metal-like state and a peak at about 7 K associated with the AFM phase transition. The transverse magnetoresistance exhibits a crossover at a critical field from the semiclassical weak-field ${H}^{2}$ dependence to the high-field linear dependence, due to the Dirac nodal line states in DySbTe. The first principles calculations of band structures illustrate that DySbTe is a DNL semimetal and turns to be a weak topological insulator if the spin-orbit coupling is considered. DySbTe will be a new topological compound exhibiting the complex interplay between magnetism, topology, and electron correlations.