Quantum magnetotransports derived from the topological Dirac fermions in single-crystalline Pt3Te4 semimetal: Observations of chiral anomaly, quantum interference, and surface helical spin textures

This study investigated exotic quantum magnetotransports and magnetization properties of Pt ₃Te ₄ single crystals to probe the topological properties of the mitrofanovite Pt ₃Te ₄ . The signature of helical spin texture from the topological surface state and the chiral anomaly associated with a linear-like energy dispersion of electronic states were detected. At low temperatures, the negative magnetoresistance in the low-field region could be explained with the transport formula containing the chiral-anomaly effect as well as the quantum interference of weak localization/antilocalization transports. Moreover, the high-field transverse magnetoresistance at temperatures below 60 K showed a non-saturating, linear-like behavior. This was examined using the theory of Abrikosov’s quantum magnetoresistance. The findings indicate a Dirac-cone-like dispersion in Pt ₃Te ₄ at low temperatures. This study`s findings reveal the significant impact of the concept that the magnetotransport in Pt ₃Te ₄ can be dominated by the topological Dirac fermions in a surface state, which reveal the signatures of quantum magnetotransport, being a new candidate of Dirac semimetal.