The chirality associated with broken time reversal symmetry in magnetically doped topological insulators has important implications to the quantum transport phenomena. Here we report the anomalous Hall effect studies in Mn- and Cr-doped Bi2Te3 topological insulators with varied thickness and doping content. By tracing the chirality of the Hall loops, we find that the Mn-type anomalous Hall effect 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 model to explain the evolution of magnetic order and anomalous Hall effect chirality in magnetically doped topological insulators.
@article{arxiv.2112.06221,
title = {Ambi-chiral anomalous Hall effect in magnetically doped topological insulators},
author = {Chang Liu and Yunyi Zang and Yan Gong and Ke He and Xucun Ma and Qi-Kun Xue and Yayu Wang},
journal= {arXiv preprint arXiv:2112.06221},
year = {2022}
}