Anomalous and topological Hall effect in Cu doped Sb_2Te_3 topological insulator

摘要

The magneto-transport and magnetization measurements of Sb_(1.90)Cu_(0.10)Te_3 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 Sb_(1.90)Cu_(0.10)Te_3 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.