Magnetotransport response in the 3D topological insulator Bi2Te3 with indium superconducting electrodes

3D Topological insulators (TIs) include novel surface states which are protected by time reversal symmetry from backscattering by impurities. Recently, the superconducting proximity effect at the interface between a TI and a superconductor has been a focus of attention. Hence, our study explores the magnetotransport behavior of thin Bi$_{\mathrm{2}}$Te$_{\mathrm{3}}$ flakes with superconducting electrodes in a Hall bar configuration. Such specimens exhibit a magnetoresistance anomaly resulting from the proximity effect. To better understand this magnetoresistance anomaly, we examine here the effect of biasing thin Bi$_{\mathrm{2}}$Te$_{\mathrm{3}}$ flakes samples of different thicknesses simultaneously with both a dc and a low-frequency ac current through the same pair of contacts at the ends of the device. Here, we report the role of finite bias and electron heating on the observed effects.