Affiliation:
1. National Taiwan University
2. National Cheng Kung University
Abstract
Abstract
Exotic magnetotransport and magnetization properties of Pt3Te4 single crystals were investigated to probe the topological properties of the Pt3Te4 semimetal. Pt3Te4 reveals a strongly correlated electronic feature as well as a non-trivial magnetoresistance (MR) characteristic. 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 longitudinal magnetoresistance in the low-field region could be explained with the transport formula containing the chiral-anomaly effect as well as the weak antilocalization transport. Moreover, the high-field transverse magnetoresistance at temperatures below 60 K showed a non-saturating linear-like behavior, which was examined with the theory of Abrikosov’s quantum MR, indicating a Dirac-cone-like dispersion in Pt3Te4 at low temperatures. This work reveals the drastic impact of the concept that the magnetotransport in Pt3Te4 can be dominated by the surface electrons in a Dirac fermion state, thus inferring that Pt3Te4 is a new candidate of Dirac semimetal.
Publisher
Research Square Platform LLC