Strain-tuning of transport properties in the half-Heusler topological semimetal GdPtBi

Half-Heusler materials have garnered significant interest due to their unique magnetic and superconducting properties. Recently, they have emerged as a platform for the exploration of topologically non-trivial band structures. GdPtBi, a rare-earth antiferromagnetic material, is one such candidate that exhibits intriguing transport phenomena, including negative longitudinal and transverse magnetoresistance, which suggests the possible existence of Weyl fermions and a chiral anomaly. Understanding how this material behaves under strain, which can potentially move it between topologically trivial and non-trivial states, is critically important. In this talk, I will discuss the influence of unidirectional stress on the magnetic and transport properties of GdPtBi, with a particular focus on Shubnikov–de Haas oscillations, which provides insights into Fermi-surface changes as a function of strain.