Robust negative longitudinal magnetoresistance and spin-orbit torque in sputtered Pt₃Sn and Pt₃Sn_xFe_1-x topological semimetal.

ABSTRACT: Contrary to topological insulators, topological semimetals possess a nontrivial chiral anomaly that leads to negative magnetoresistance and are hosts to both conductive bulk states and topological surface states with intriguing transport properties for spintronics. Here, we fabricate highly-ordered metallic Pt₃Sn and Pt₃Sn_xFe_1-x thin films via sputtering technology. Systematic angular dependence (both in-plane and out-of-plane) study of magnetoresistance presents surprisingly robust quadratic and linear negative longitudinal magnetoresistance features for Pt₃Sn and Pt₃Sn_xFe_1-x, respectively. We attribute the anomalous negative longitudinal magnetoresistance to the type-II Dirac semimetal phase (pristine

SUBMITTER: Zhang D 

PROVIDER: S-EPMC10338453 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature