摘要
The chirality associated with broken time-reversal symmetry in magnetically doped topological insulators has important implications for the quantum transport phenomena.Here we report anomalous Hall effect studies in Mn-and Cr-doped Bi_(2)Te_(3) topological insulators with varied thicknesses and doping contents.By tracing the magnitude of the anomalous Hall resistivity,we find that the Mn-type anomalous Hall effect characterized with clockwise chirality is strengthened by the reduction of film thickness,which is opposite to that of the Cr-type anomalous Hall effect with counterclockwise chirality.We provide a phenomenological physical picture to explain the evolution of the magnetic order and the anomalous Hall chirality in magnetically doped topological insulators.
基金
This work was supported by the Basic Science Center Project of National Natural Science Foundation of China(Grant No.51788104)
the National Key R&D Program of China(Grant Nos.2018YFA0307100,and 2018YFA0305603)
This work was supported in part by the Beijing Advanced Innovation Center for Future Chip(ICFC).
