Superconducting and weak ferromagnetic features at interfaces of bicrystals of 3D topological insulator BI 1-XSB X

Abstract

In this report we present the results of study of the magnetic and superconducting properties of bicrystals of 3D topological insulator (TI) Bi1-xSbx (0 ≤x ≤ 0.2) in temperature range 1.8-100K using Quantum Design SQUID magnetometer and a Physical Property Measuring System (PPMS) with a 140 kOe magnet. Two types of bicrystals were investigated: inclination type (crystallographic axes of the crystallites are revolved in a single plane) and twisting type (crystallographic axes of crystallites are revolved in two planes).