Anomalous and topological Hall effect in Cu doped Sb2Te3 topological insulator

Abstract

The magneto-transport and magnetization measurements of Sb1.90Cu0.10Te3 were performed by varying both temperature and the magnetic field. The induced antiferromagnetic ordering with Cu doping and the observed quantum oscillation in it indicate that magnetization in Sb1.90Cu0.10Te3 is the bulk property. The non-linearity in Hall data suggests the existence of anomalous and topological Hall effects. Moreover, the electronic band structure calculation supports the existence of Cu spin texture.