Magnetic and transport properties of topological semimetal candidate <i>Ln</i>SbTe (<i>Ln</i> = Sm, Nd)

The ZrSiS family compounds host various exotic quantum phenomena due to the presence of both topological nonsymmorphic Dirac fermions and nodal line fermions. The inherent magnetism in LnSbTe (Ln= lanthanide rare earth) compounds offers opportunity to study possible new quantum states. Here, we report magnetic and transport properties of previously unexplored topological nodal line semimetal candidates NdSbTe and SmSbTe. These materials show antiferromagnetic ground state and strong electronic correlations unlike many other known LnSbTe compounds. All the findings suggest that these materials can offer a rare platform to explore exotic quantum phenomena arising from the interplay between magnetism, topology, and electronic correlations.