Magnetic proximity effect in the two-dimensional ε-Fe2O3/NbSe2 heterojunction

doi:10.1088/1674-1056/ad09d2

中国物理B ›› 2024, Vol. 33 ›› Issue (2): 27502-027502.doi: 10.1088/1674-1056/ad09d2

Magnetic proximity effect in the two-dimensional ε-Fe₂O₃/NbSe₂ heterojunction

Bingyu Che(车冰玉)^1,2,†, Guojing Hu(胡国静)^1,†, Chao Zhu(朱超)³, Hui Guo(郭辉)^1,2, Senhao Lv(吕森浩)¹, Xuanye Liu(刘轩冶)^1,2, Kang Wu(吴康)^1,2, Zhen Zhao(赵振)^1,2, Lulu Pan(潘禄禄)¹, Ke Zhu(祝轲)^1,2, Qi Qi(齐琦)^1,2, Yechao Han(韩烨超)^1,2, Xiao Lin(林晓)², Zi'an Li(李子安)⁴, Chengmin Shen(申承民)^1,2, Lihong Bao(鲍丽宏)^1,2, Zheng Liu(刘政)^3,¶, Jiadong Zhou(周家东)^5,§, Haitao Yang(杨海涛)^1,2,‡, and Hong-Jun Gao(高鸿钧)^1,2

1 Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;
3 School of Materials Science and Engineering, Nanyang Technological University, Singapore;
4 School of Physical Science and Technology, Guangxi University, Guangxi 530004, China;
5 School of Physics, Beijing Institute of Technology, Beijing 100081, China

收稿日期:2023-09-17 修回日期:2023-10-28 接受日期:2023-11-06 出版日期:2024-01-16 发布日期:2024-01-19
通讯作者: Haitao Yang, Jiadong Zhou, Zheng Liu E-mail:htyang@iphy.ac.cn;jdzhou@bit.edu.cn;z.liu@ntu.edu.sg
基金资助:
We thank Gangqin Liu for the helpful discussions. The work is supported by the National Key Research and Development Program of China (Grant No. 2022YFA1204104), the National Natural Science Foundation of China (Grant No. 61888102), the Chinese Academy of Sciences (Grant Nos. ZDBS-SSW-WHC001 and XDB33030100).

Magnetic proximity effect in the two-dimensional ε-Fe₂O₃/NbSe₂ heterojunction

1 Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;
3 School of Materials Science and Engineering, Nanyang Technological University, Singapore;
4 School of Physical Science and Technology, Guangxi University, Guangxi 530004, China;
5 School of Physics, Beijing Institute of Technology, Beijing 100081, China

Received:2023-09-17 Revised:2023-10-28 Accepted:2023-11-06 Online:2024-01-16 Published:2024-01-19
Contact: Haitao Yang, Jiadong Zhou, Zheng Liu E-mail:htyang@iphy.ac.cn;jdzhou@bit.edu.cn;z.liu@ntu.edu.sg
Supported by:
We thank Gangqin Liu for the helpful discussions. The work is supported by the National Key Research and Development Program of China (Grant No. 2022YFA1204104), the National Natural Science Foundation of China (Grant No. 61888102), the Chinese Academy of Sciences (Grant Nos. ZDBS-SSW-WHC001 and XDB33030100).

摘要/Abstract

摘要： Two-dimensional (2D) magnet/superconductor heterostructures can promote the design of artificial materials for exploring 2D physics and device applications by exotic proximity effects. However, plagued by the low Curie temperature and instability in air, it is hard to realize practical applications for the reported layered magnetic materials at present. In this paper, we developed a space-confined chemical vapor deposition method to synthesize ultrathin air-stable ε-Fe₂O₃ nanosheets with Curie temperature above 350 K. The ε-Fe₂O₃/NbSe₂ heterojunction was constructed to study the magnetic proximity effect on the superconductivity of the NbSe₂ multilayer. The electrical transport results show that the subtle proximity effect can modulate the interfacial spin-orbit interaction while undegrading the superconducting critical parameters. Our work paves the way to construct 2D heterojunctions with ultrathin nonlayered materials and layered van der Waals (vdW) materials for exploring new physical phenomena.

关键词: two-dimensional heterojunctions, magnetic proximity effect, non-layered magnetic nanosheet, spin-orbit interaction

Abstract: Two-dimensional (2D) magnet/superconductor heterostructures can promote the design of artificial materials for exploring 2D physics and device applications by exotic proximity effects. However, plagued by the low Curie temperature and instability in air, it is hard to realize practical applications for the reported layered magnetic materials at present. In this paper, we developed a space-confined chemical vapor deposition method to synthesize ultrathin air-stable ε-Fe₂O₃ nanosheets with Curie temperature above 350 K. The ε-Fe₂O₃/NbSe₂ heterojunction was constructed to study the magnetic proximity effect on the superconductivity of the NbSe₂ multilayer. The electrical transport results show that the subtle proximity effect can modulate the interfacial spin-orbit interaction while undegrading the superconducting critical parameters. Our work paves the way to construct 2D heterojunctions with ultrathin nonlayered materials and layered van der Waals (vdW) materials for exploring new physical phenomena.

Key words: two-dimensional heterojunctions, magnetic proximity effect, non-layered magnetic nanosheet, spin-orbit interaction

中图分类号: (Magnetic properties of interfaces (multilayers, superlattices, heterostructures))

75.70.Cn

74.45.+c (Proximity effects; Andreev reflection; SN and SNS junctions) 75.75.Cd (Fabrication of magnetic nanostructures) 75.70.Tj (Spin-orbit effects)

Bingyu Che(车冰玉), Guojing Hu(胡国静), Chao Zhu(朱超), Hui Guo(郭辉), Senhao Lv(吕森浩), Xuanye Liu(刘轩冶), Kang Wu(吴康), Zhen Zhao(赵振), Lulu Pan(潘禄禄), Ke Zhu(祝轲), Qi Qi(齐琦), Yechao Han(韩烨超), Xiao Lin(林晓), Zi'an Li(李子安), Chengmin Shen(申承民), Lihong Bao(鲍丽宏), Zheng Liu(刘政), Jiadong Zhou(周家东), Haitao Yang(杨海涛), and Hong-Jun Gao(高鸿钧). Magnetic proximity effect in the two-dimensional ε-Fe₂O₃/NbSe₂ heterojunction[J]. 中国物理B, 2024, 33(2): 27502-027502.

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Magnetic proximity effect in the two-dimensional ε-Fe₂O₃/NbSe₂ heterojunction

Magnetic proximity effect in the two-dimensional ε-Fe₂O₃/NbSe₂ heterojunction

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