Electronic and magnetic properties of the topological semimetal candidate NdSbTe
K. C. Pandey, Rabindra Basnet, Aaron Wegner, Gokul Acharya, Md Rafique Un Nabi, Jiangwei Liu, Jian Wang, Y. K. Takahashi, Bo Da, Jin Hu
Abstract
ZrSiS-type materials represent a large material family with unusual coexistence of topological nonsymmorphic Dirac fermions and nodal-line fermions. As a special group of ZrSiS family, $\mathit{Ln}\mathrm{SbTe}$ ($Ln=\mathrm{lanthanide}\phantom{\rule{0.16em}{0ex}}\mathrm{rare}\ensuremath{-}\mathrm{earth}$) compounds provide a unique opportunity to explore new quantum phases due to the intrinsic magnetism induced by $\mathit{Ln}$. Here we report the single-crystal growth and characterization of NdSbTe, a previously unexplored $\mathit{Ln}\mathrm{SbTe}$ compound. NdSbTe has an antiferromagnetic ground state with field-driven metamagnetic transitions similar to other known $\mathit{Ln}\mathrm{SbTe}$, but exhibits distinct enhanced electronic correlations characterized by large a Sommerfeld coefficient of $115\phantom{\rule{0.16em}{0ex}}\mathrm{mJ}/\mathrm{mol}\phantom{\rule{0.16em}{0ex}}{\mathrm{K}}^{2}$, which is the highest among the known $\mathit{Ln}\mathrm{SbTe}$ compounds. Furthermore, our transport studies have revealed the coupling with magnetism and signatures of Kondo localization. All these findings establish NdSbTe as a platform for observing phenomena arising from the interplay between magnetism, topology, and electron correlations.