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Doping tuned anomalous Hall effect in the van der Waals magnetic topological phases Mn(Sb1-xBix)4Te7 |
| Xin Zhang(张鑫)1, Zhicheng Jiang(江志诚)2, Jian Yuan(袁健)1, Xiaofei Hou(侯骁飞)1, Xia Wang(王霞)3, Na Yu(余娜)3, Zhiqiang Zou(邹志强)3, Zhengtai Liu(刘正太)2,6,†, Wei Xia(夏威)1,5,‡, Zhenhai Yu(于振海)1, Dawei Shen(沈大伟)4, and Yanfeng Guo(郭艳峰)1,5 |
1 School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China;
2 State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences, Shanghai 200050, China;
3 Analytical Instrumentation Center, School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China;
4 National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China;
5 ShanghaiTech Laboratory for Topological Physics, ShanghaiTech University, Shanghai 201210, China;
6 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract The van der Waals (vdW) MnSb4Te7 is a newly synthesized antiferromagnetic (AFM) topological insulator hosting a robust axion insulator state irrelative to the specific spin structure. However, the intrinsic hole doped character of MnSb4Te7 makes 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 of partially replacing Sb with Bi as Mn(Sb1-xBix)4Te7 was tried and the magnetotransport properties, in particular, the anomalous Hall effect, were measured and analyzed. Through the electron doping, the anomalous Hall conductance σAH changes 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.
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Received: 23 March 2023
Revised: 08 May 2023
Accepted manuscript online: 17 May 2023
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PACS:
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72.80.Ga
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(Transition-metal compounds)
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75.50.Ee
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(Antiferromagnetics)
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75.47.-m
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(Magnetotransport phenomena; materials for magnetotransport)
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73.43.Nq
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(Quantum phase transitions)
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| Fund: Project supported by the Shanghai Science and Technology Innovation Action Plan (Grant No. 21JC1402000), the National Natural Science Foundation of China (Grant No. 12004405), the State Key Laboratory of Functional Materials for Informatics (Grant No. SKL2022), the Double FirstClass Initiative Fund of ShanghaiTech University, the Analytical Instrumentation Center (Grant No. SPST-AIC10112914), SPST, and ShanghaiTech University. W. Xia acknowledges the research fund from the State Key Laboratory of Surface Physics and Department of Physics of Fudan University (Grant No. KF2022_13). |
Corresponding Authors:
Zhengtai Liu, Wei Xia
E-mail: ztliu@mail.sim.ac.cn;xiawei2@shanghaitech.edu.cn
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Cite this article:
Xin Zhang(张鑫), Zhicheng Jiang(江志诚), Jian Yuan(袁健), Xiaofei Hou(侯骁飞), Xia Wang(王霞),Na Yu(余娜), Zhiqiang Zou(邹志强), Zhengtai Liu(刘正太), Wei Xia(夏威),Zhenhai Yu(于振海), Dawei Shen(沈大伟), and Yanfeng Guo(郭艳峰) Doping tuned anomalous Hall effect in the van der Waals magnetic topological phases Mn(Sb1-xBix)4Te7 2023 Chin. Phys. B 32 097201
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