Doping tuned anomalous Hall effect in the van der Waals magnetic topological phases Mn(Sb1-xBix)4Te7
Doping tuned anomalous Hall effect in the van der Waals magnetic topological phases Mn(Sb1-xBix)4Te7
复制标题
DOI：
10.1088/1674-1056/acd629
复制
发表时间：
2023
影响因子：
1.7
通讯作者：
Yanfeng Guo
中科院分区：
文献类型：
--
作者：
Xin Zhang;Zhicheng Jiang;Jian Yuan;Xiaofei Hou;Xia Wang;Na Yu;Zhiqiang Zou;Zhengtai Liu;Wei Xia;Zhenhai Yu;Dawei Shen;Yanfeng Guo
Abstract. The van der Waals (vdW) MnSb4Te7 is a newly synthesized antiferromagnetic (AFM) topological insulator hosting robust axion insulator state irrelative of the specific spin structure. However, the intrinsic hole doped character of MnSb4Te7makes the Fermi level far away from the Dirac point of about 180 meV, which is unfavorable for the exploration of exotic topological properties such as the quantum anomalous Hall effect (QAHE). To shift up the Fermi level close to the Dirac point, the strategy by partially replacing Sb by Bi as Mn(Sb1-x. Bi. x. )4Te7 was tried and the magnetotransport properties, in particularly, the anomalous Hall effect, were measured and analyzed. Through the electron doping, the anomalous Hall conductance σ. AHchanges from negative to positive between x = 0.3 and 0.5, indicative of a possible topological transition. Besides, a charge neutrality point (CNP) also appears between x = 0.6 and 0.7. The results would be instructive for further understanding the interplay between nontrivial topological states and the magnetism, as well as for the exploration of exotic topological properties.
