Conductance fluctuations and quantum oscillation in topological insulator PbBi₄Te₇

Topological insulators (TIs) are materials that behave as insulators in its interior and have conducting boundaries or edges. This unique characteristic of topological insulator was realized because of strong spin orbit coupling (SOC) of heavy elements. Here, we present the magnetotransport study of nano device made from mechanically exfoliated flake of PbBi₄Te₇ topological insulator single crystal. The temperature variation of R_xx, illustrated in this article, showing positive temperature coefficient of resistance above 15 K and bellow 15 K, it shows saturating nature, reflecting the bulk metallic signature. We present the observations of weak antilocalization and Shubinikov-de-Haas (SdH) oscillations accompanied by unique conductance fluctuations