Magnetic and transport properties of the topological compound DySbTe
Fei Gao, Jianqi Huang, Weijun Ren, Mingze Li, Han Wang, Teng Yang, Bing Li, Zhidong Zhang
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.