Electronic and Magnetic Properties of Topological Semimetal Candidate NdSbTe

TL;DR

This study reports the synthesis and characterization of NdSbTe, a magnetic topological semimetal with strong electronic correlations, revealing complex interplay between magnetism, topology, and electron localization.

Contribution

It introduces NdSbTe as a new magnetic topological semimetal with enhanced correlations and unique magnetic and electronic properties, expanding the family of LnSbTe compounds.

Findings

NdSbTe exhibits antiferromagnetic order with metamagnetic transitions.

It has the highest Sommerfeld coefficient among LnSbTe compounds, indicating strong correlations.

Transport measurements show coupling between magnetism and electronic behavior.

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, LnSbTe (Ln = Lanthanide rare earth) compounds provide a unique opportunity to explore new quantum phases due to the intrinsic magnetism induced by Ln. Here we report the single crystal growth and characterization of NdSbTe, a previously unexplored LnSbTe compound. NdSbTe has an antiferromagnetic ground state with field-driven metamagnetic transitions similar to other known LnSbTe, but exhibits distinct enhanced electronic correlations characterized by large a Sommerfeld coefficient of 115 mJ/mol $K^2$, which is the highest among the known LnSbTe compounds. Furthermore, our transport studies have revealed the coupling with magnetism and signatures of Kondo localization. All these findings establish NdSbTe as a new platform for observing novel phenomena arising from the interplay between magnetism, topology, and electron correlations.