Evolution of Magnetoresistance in the magnetic topological semimetals NdSbxTe2-x

TL;DR

This study investigates how changing Sb and Te composition in NdSbxTe2-x affects its transport properties, revealing a nonmonotonic magnetoresistance behavior with potential for future topological device applications.

Contribution

It demonstrates the composition-dependent evolution of magnetoresistance in NdSbxTe2-x, highlighting the strong negative magnetoresistance at low Sb content and its implications for topological semimetal research.

Findings

Strong negative magnetoresistance up to 99.9% at low Sb content

Nonmonotonic evolution of magnetoresistance with composition

Potential for topological semimetal applications

Abstract

Magnetic topological semimetals LnSbTe (Ln = lanthanide elements) provide a platform to study the interplay of structure, magnetism, topology, and electron correlations. Varying Sb and Te compositions in LnSbxTe2-x can effectively control the electronic, magnetic, and transport properties. Here, we report the evolution of transport properties with Sb and Te contents in NdSbxTe2-x, (0 < x < 1). Our work reveals nonmonotonic evolution in magnetoresistance with varying composition stoichiometry. Specifically, reducing Sb content x leads to strong negative magnetoresistance up to 99.9%. Such a strong magnetoresistance, which is likely attributed to the interplay between structure, magnetism, and electronic bands, establishes this material as a promising platform for investigating topological semimetal for future device applications.