Speaker
Description
The LnSbTe (Ln = lanthanide) family is regarded as a promising platform for studying the interplay among topological electronic states, 4 f magnetism, and electron correlations [1,2]. In particular, NdSbTe is a magnetic topological semimetal candidate with antiferromagnetic ordering below 2.7 K, strong electronic correlations, and signatures of Kondo behavior [1]. Previous studies have shown that the Sb/Te ratio in NdSb$_{1-x}$Te$_{1+x}$ can significantly modify the electronic structure and charge-density-wave distortions, leading to the tuning of the magnetic ground states [2,3]. Here, we investigate the temperature and magnetic-field-dependent electrical resistivity of NdSb$_{0.5}$Te$_{1.5}$. At zero field, resistivity measurements reveal nonmetallic-like behavior at low temperatures, followed by a dramatic increase in resistivity below 5 K and a resistive anomaly associated with a magnetic transition near 3 K. With increasing magnetic field, this anomaly is continuously suppressed toward zero temperature. Magnetoresistance measurements reveal peak-like anomalies at low fields and low temperatures. These field-sensitive anomalies suggest a strong coupling between charge transport and magnetic states, potentially associated with a topological state in NdSb$_{0.5}$Te$_{1.5}$.
Reference
[1] K. Pandey et al., Phys. Rev. B 101, 235161 (2020).
[2] T. H. Salters et al., Phys. Rev. Materials 7, 044203 (2023).
[3] S. Karki Chhetri et al., Phys. Rev. B 112, 134443 (2025).
