Large linear magnetoresistance and weak anti-localization in Y(Lu)PtBi topological insulators

Abstract

Topological insulators are new kind of Dirac materials that possess bulk insulating and surface conducting behavior. They are basically known for their unique electronic properties at the surface. Here we present the magneto-transport properties of our high quality single crystalline Y(Lu)PtBi Heusler topological insulators, which belong to a group of noncentrosymmetric superconductor with Tc = 0:8 K. Both the compounds show semi-metallic behavior with low charge carrier of 6 x1018 cm^-3 for YPtBi and 8 x1019 cm^-3 for LuPtBi at 2 K. Magneto-conductivity measurements in the tilted field indicate that the charge carriers transport through quantum interference. This provide a direct evidence of weak anti-localization below 50 K, giving a strong signature of surface transport. Most importantly, these compounds show very high unsaturated linear magnetoresistance of approximately 2000% at 10 K in a magnetic field of 60 T.

arXiv comment7 pages, 8 figures, some reference numbers were missed in the text

Cited by in corpus (4)

• Topological Materials: Weyl Semimetals
• Observation of Unusual Topological Surface States in Half-Heusler Compounds LnPtBi (Ln=Lu, Y)
• Shubnikov-de Haas oscillations, weak antilocalization effect and large linear magnetoresistance in the putative topological superconductor LuPdBi
• Proximity-induced superconductivity and quantum interference in topological crystalline insulator SnTe thin film devices