Superconductivity and weak localization of PdxBi2Se3 whiskers at low temperatures

The temperature dependencies of Bi 2 Se 3 whiskers’ resistance with Pd doping concentration of (1 ÷ 2)×10 19 cm −3 where measured in the temperature range 1.5 ÷ 77 K. At temperature 5.3 K a sharp drop in the whisker resistance was found. The observed effect is likely connected with the contribution of two processes such as the electron localization and superconductivity at temperatures below 5.3 K. The magnetoresistance in the n-type conductivity Bi 2 Se 3 whiskers with different doping concentration of palladium that correspond to metal side of the metal–insulator transition was studied at low temperatures and magnetic field 0 ÷ 10 T. The whisker magnetoconductance is considered in the framework of the weak antilocalization model and connected with subsurface layers of Bi 2 Se 3 whiskers.