Fabrication-induced even-odd discrepancy of magnetotransport in few-layer MnBi$_2$Te$_4$
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2023
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866916215820124160 |
|---|---|
| author | Li, Yaoxin Wang, Yongchao Lian, Zichen Li, Hao Gao, Zhiting Xu, Liangcai Wang, Huan Lu, Rui'e Li, Longfei Feng, Yang Zhu, Jinjiang Liu, Liangyang Wang, Yongqian Fu, Bohan Yang, Shuai Yang, Luyi Wang, Yihua Xia, Tianlong Liu, Chang Jia, Shuang Wu, Yang Zhang, Jinsong Wang, Yayu Liu, Chang |
| author_facet | Li, Yaoxin Wang, Yongchao Lian, Zichen Li, Hao Gao, Zhiting Xu, Liangcai Wang, Huan Lu, Rui'e Li, Longfei Feng, Yang Zhu, Jinjiang Liu, Liangyang Wang, Yongqian Fu, Bohan Yang, Shuai Yang, Luyi Wang, Yihua Xia, Tianlong Liu, Chang Jia, Shuang Wu, Yang Zhang, Jinsong Wang, Yayu Liu, Chang |
| contents | The van der Waals antiferromagnetic topological insulator MnBi2Te4 represents a promising platform for exploring the layer-dependent magnetism and topological states of matter. Recently observed discrepancies between magnetic and transport properties have aroused controversies concerning the topological nature of MnBi2Te4 in the ground state. In this article, we demonstrate that fabrication can induce mismatched even-odd layer dependent magnetotransport in few-layer MnBi2Te4. We perform a comprehensive study of the magnetotransport properties in 6- and 7-septuple-layer MnBi2Te4, and reveal that both even- and odd-number-layer device can show zero Hall plateau phenomena in zero magnetic field. Importantly, a statistical survey of the optical contrast in more than 200 MnBi2Te4 flakes reveals that the zero Hall plateau in odd-number-layer devices arises from the reduction of the effective thickness during the fabrication, a factor that was rarely noticed in previous studies of 2D materials. Our finding not only provides an explanation to the controversies regarding the discrepancy of the even-odd layer dependent magnetotransport in MnBi2Te4, but also highlights the critical issues concerning the fabrication and characterization of 2D material devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2306_02046 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Fabrication-induced even-odd discrepancy of magnetotransport in few-layer MnBi$_2$Te$_4$ Li, Yaoxin Wang, Yongchao Lian, Zichen Li, Hao Gao, Zhiting Xu, Liangcai Wang, Huan Lu, Rui'e Li, Longfei Feng, Yang Zhu, Jinjiang Liu, Liangyang Wang, Yongqian Fu, Bohan Yang, Shuai Yang, Luyi Wang, Yihua Xia, Tianlong Liu, Chang Jia, Shuang Wu, Yang Zhang, Jinsong Wang, Yayu Liu, Chang Mesoscale and Nanoscale Physics Materials Science The van der Waals antiferromagnetic topological insulator MnBi2Te4 represents a promising platform for exploring the layer-dependent magnetism and topological states of matter. Recently observed discrepancies between magnetic and transport properties have aroused controversies concerning the topological nature of MnBi2Te4 in the ground state. In this article, we demonstrate that fabrication can induce mismatched even-odd layer dependent magnetotransport in few-layer MnBi2Te4. We perform a comprehensive study of the magnetotransport properties in 6- and 7-septuple-layer MnBi2Te4, and reveal that both even- and odd-number-layer device can show zero Hall plateau phenomena in zero magnetic field. Importantly, a statistical survey of the optical contrast in more than 200 MnBi2Te4 flakes reveals that the zero Hall plateau in odd-number-layer devices arises from the reduction of the effective thickness during the fabrication, a factor that was rarely noticed in previous studies of 2D materials. Our finding not only provides an explanation to the controversies regarding the discrepancy of the even-odd layer dependent magnetotransport in MnBi2Te4, but also highlights the critical issues concerning the fabrication and characterization of 2D material devices. |
| title | Fabrication-induced even-odd discrepancy of magnetotransport in few-layer MnBi$_2$Te$_4$ |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2306.02046 |